TJ Tire Size
#71
Guest
Posts: n/a
Re: TJ Tire Size
Got it. I was wondering where 1270 came from. If we multiply the the two
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
#72
Guest
Posts: n/a
Re: TJ Tire Size
Got it. I was wondering where 1270 came from. If we multiply the the two
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
#73
Guest
Posts: n/a
Re: TJ Tire Size
Got it. I was wondering where 1270 came from. If we multiply the the two
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
divisions to cancel them out, we get 2540, then divide that by 2 and we get
1270. then we can use 1270 to replace three computation steps. Got it.
"c" <c@me.org> wrote in message
news:9mIYe.56095$32.30628@tornado.rdc-kc.rr.com...
> Our formulas end up doing the same thing. I just eliminated a few steps.
> Your formula divides by 100 to convert the ratio to a whole number,
> multiplies by 2 for the sidewalls, and divides by 25.4 to convert mm to
> inches. This is the same as dividing by 1270. ;-)
>
> Chris
>
> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> news:4amdnUSAFJQmrq7eRVn-uw@ez2.net...
>> Where did you come up with 1270?
>>
>> The correct way to express the formula is ((((A* B)/100) * 2) / 25.4 +
>> C),
>> where A = Size, B = Ratio, and C = Rim, and A, B, and C all have the same
>> row number, A1, B1, C1, or A2, B2, C2, etc.
>>
>> The beauty of Excel is that it starts on the left of any expression, and
>> applies the functions it encounters as it moves to the right, this might
> not
>> be correct from a mathematics point of view, but it's predictable and if
> you
>> expect it to behave that way, then you can write your formula to fit. I
>> don't know how it handles rocket science, but my guess is that you can't
> get
>> to the moon with a ------ sheet, so who cares?
>>
>> An alternate way to express the tire size calculator is
>> A * (B / 100) ...
>>
>> In this case, it would make the Aspect Ratio into a percentage before it
>> multiplied by the size.
>>
>>
>>
>>
>> "c" <c@me.org> wrote in message
>> news:Vh6Ye.51848$32.15958@tornado.rdc-kc.rr.com...
>> > Tomes,
>> >
>> > You probably entered the aspect ratio as 75 where, with this formula
>> > you
>> > need to enter it as .75. I simplified the formula to use the aspect
> ratio
>> > without the decimal point and also condensed all of the conversions
> coming
>> > up with A2*B2/1270+C2 for the formula. Remember, with this formula, you
>> > enter the aspect ratio without the decimal point(i.e. 75 instead of
> .75).
>> >
>> > Chris
>> >
>> > "Tomes" <XXtomanml@earthlink.net> wrote in message
>> > news:nE3Ye.1856$QE1.238@newsread2.news.atl.earthli nk.net...
>> >> hmmm. I do this with 225,75 and 15 plugged in and I get an answer of
>> >> 1343.74
>> >> Formula used: =((A2*B2)*2/25.4+C2)
>> >> ?
>> >>
>> >> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> news:QYOdnccVMpVSKa3eRVn-pQ@ez2.net...
>> >> > I got it.
>> >> >
>> >> > I wrote an Excel calculator that lets me plug in the tire dimensions
>> >> > and
>> >> > arrive at the outside diameter. I just didn't know the dimensions of
>> >> > the
>> >> > Rubi's tires, and I thought they worked out to 32", not 31".
>> >> >
>> >> > Try this formula with your calculator
>> >> > <tire size, 225, etc.> * <aspect ratio, 70, 75, etc.> * 2 / 25.4 +
> <rim
>> >> > diameter, 15, 16, etc.> The result is the overall diameter.
>> >> >
>> >> > If you created a new Excel ------ sheet, you could label the A
>> >> > column
>> >> > as
>> >> > Size, the B column as Aspect Ratio, and the C column as Rim, and the
> D
>> >> > column as Outside Diameter. The D column would get the formula
>> > =((A2*B2)*2
>> >> /
>> >> > 25.4 + C2)
>> >> >
>> >> > The result in the D cells would be the diameter of the tires you are
>> >> > interested in.
>> >> >
>> >> > TIP
>> >> > Highlight the D2 cell, and drag the handlebar straight down to apply
>> >> > the
>> >> > formula with the approriate alterations to account for the Rows
>> > involved.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
>> >> > news:6c83$43307a5d$d8449845$28280@FUSE.NET...
>> >> > > 255-75X16s will give you a 31.1 inch tire with a 10 inch sectional
>> >> width.
>> >> > >
>> >> > > http://www.4lo.com/calc/gearmetric.htm
>> >> > >
>> >> > > --
>> >> > > .
>> >> > > Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >> > > 2002 Jeep WJ 4 Liter Automatic
>> >> > > Brilliant Black Crystal Pearl Coat
>> >> > > Sharing is why we are all here....... or should be.
>> >> > > .
>> >> > > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > > news:2umdndYpIr6H663eRVn-tQ@ez2.net...
>> >> > >> My bad. I was sure the Rubi got 32s.
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >>
>> >> > >> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
>> >> > >> news:nJqdnaEIHa6NkrLeRVn-qQ@comcast.com...
>> >> > >>> From the Jeep.com website, in reference to the Rubicon Goodyear
>> > MTR's:
>> >> > >>>
>> >> > >>> "Built with exclusive Durawall triple-ply puncture-resistant
>> >> sidewalls,
>> >> > >>> these beasty 31-inch tires will grab ledges and anything else
> they
>> > can
>> >> > >>> sink their claws into."
>> >> > >>>
>> >> > >>> In actuality, they are LT245/75R16, which work out to be about
>> > 30.75"
>> >> > >>> diameter.
>> >> > >>>
>> >> > >>> "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > >>> news:l7idnRDX1sUylLLeRVn-uA@ez2.net...
>> >> > >>>> Rubis get a 32.
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>>
>> >> > >>>> "Steve G" <stevncin@charter.net> wrote in message
>> >> > >>>> news:nj5Xe.43286$1g2.30326@fe05.lga...
>> >> > >>>>> 31x10.5 was what i had on my 97 with no trouble..seems thats
> what
>> > is
>> >> > >>>>> on the Rubicons as well.
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>> "BM" <smithers340@hotmail.com> wrote in message
>> >> > >>>>> news:432ccd6b.45487718@news.cogeco.ca...
>> >> > >>>>>> I've got Goodyear Wrangler 30 x 9.5 inch tires on my stock
>> >> > >>>>>> '02
>> >> > >>>>>> Safari.
>> >> > >>>>>> Looks like she's due for some new rubber. What's the largest
>> > tire
>> >> I
>> >> > >>>>>> can go to without a body or suspension lift & not experience
> any
>> >> > >>>>>> problems? Any good tire recommenadtions? No seroius
>> >> > >>>>>> offroading
>> > with
>> >> > >>>>>> lots of city & highway driving. Thanks!!
>> >> > >>>>>>
>> >> > >>>>>> BM
>> >> > >>>>>
>> >> > >>>>>
>> >> > >>>>
>> >> > >>>
>> >> > >>>
>> >> > >>
>> >> > >
>> >> > >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
>
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