You came up with a neat millimeters to inches converter of dividing
by 25.4, but it didn't take into consideration the tire series
measurement, like the 275/60X15 is three inches less in height than the
31X10.50X15: http://www.1010tires.com/TireSizeCalculator.asp You might
familiarize yourself with tire terminology:
http://www.1010tires.com/tiretech.asp The series is a percentage of the
tire's width it has in height. Then maybe study the design of a rim:
http://www.off-road.com/jeep/wheel.htm See that rib on the rim the
tire's heel and toe must fit into, now imagine putting an incorrect size
tire on that rim.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

jason@cyberpine.com wrote:
>
> I'm starting to agree, An installer I spoke to said they would fall if
> took a hard turn.
>
> I currently have 10.5 on my 15x7 and was consider 275/60-15 ..
>
> 275/25.4 = 10.8 inches. Is this a correct conversion? and is 10.5
> really 10.5? 275/60 look much fatter (since shorter) than 10.5x31
> truck tires btw.
>
> And for my other truck a 93 Ford 2wd ranger with stock rims 14x7, can
> I get away with 255/60-14. 255 = 10.03 inches. I believe I've done
> this before. Anybody doing this?
>
> I can help but bring up the fact again, that when deflated, the inner
> rim of most tires is pretty narrow and that tires seem to adhear the
> ballon shape and might be safer that way as oppose the other extreme
> of forcing the lip out with air alone.
>
> Thanks *all* for the good info.

 

You came up with a neat millimeters to inches converter of dividing
by 25.4, but it didn't take into consideration the tire series
measurement, like the 275/60X15 is three inches less in height than the
31X10.50X15: http://www.1010tires.com/TireSizeCalculator.asp You might
familiarize yourself with tire terminology:
http://www.1010tires.com/tiretech.asp The series is a percentage of the
tire's width it has in height. Then maybe study the design of a rim:
http://www.off-road.com/jeep/wheel.htm See that rib on the rim the
tire's heel and toe must fit into, now imagine putting an incorrect size
tire on that rim.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

jason@cyberpine.com wrote:
>
> I'm starting to agree, An installer I spoke to said they would fall if
> took a hard turn.
>
> I currently have 10.5 on my 15x7 and was consider 275/60-15 ..
>
> 275/25.4 = 10.8 inches. Is this a correct conversion? and is 10.5
> really 10.5? 275/60 look much fatter (since shorter) than 10.5x31
> truck tires btw.
>
> And for my other truck a 93 Ford 2wd ranger with stock rims 14x7, can
> I get away with 255/60-14. 255 = 10.03 inches. I believe I've done
> this before. Anybody doing this?
>
> I can help but bring up the fact again, that when deflated, the inner
> rim of most tires is pretty narrow and that tires seem to adhear the
> ballon shape and might be safer that way as oppose the other extreme
> of forcing the lip out with air alone.
>
> Thanks *all* for the good info.

 

You came up with a neat millimeters to inches converter of dividing
by 25.4, but it didn't take into consideration the tire series
measurement, like the 275/60X15 is three inches less in height than the
31X10.50X15: http://www.1010tires.com/TireSizeCalculator.asp You might
familiarize yourself with tire terminology:
http://www.1010tires.com/tiretech.asp The series is a percentage of the
tire's width it has in height. Then maybe study the design of a rim:
http://www.off-road.com/jeep/wheel.htm See that rib on the rim the
tire's heel and toe must fit into, now imagine putting an incorrect size
tire on that rim.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

jason@cyberpine.com wrote:
>
> I'm starting to agree, An installer I spoke to said they would fall if
> took a hard turn.
>
> I currently have 10.5 on my 15x7 and was consider 275/60-15 ..
>
> 275/25.4 = 10.8 inches. Is this a correct conversion? and is 10.5
> really 10.5? 275/60 look much fatter (since shorter) than 10.5x31
> truck tires btw.
>
> And for my other truck a 93 Ford 2wd ranger with stock rims 14x7, can
> I get away with 255/60-14. 255 = 10.03 inches. I believe I've done
> this before. Anybody doing this?
>
> I can help but bring up the fact again, that when deflated, the inner
> rim of most tires is pretty narrow and that tires seem to adhear the
> ballon shape and might be safer that way as oppose the other extreme
> of forcing the lip out with air alone.
>
> Thanks *all* for the good info.