Tires and speedometer
01-26-2007, 08:55 PM
#31
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01-26-2007, 08:55 PM
#32
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01-26-2007, 08:55 PM
#33
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01-28-2007, 12:36 AM
#34
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Posts: n/a
Re: Tires and speedometer
"tk" <thomas_kessler@comcast.net> wrote in message
news:1169848358.200219.234310@j27g2000cwj.googlegr oups.com...
>I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> wheels and tires. Does my speedometer need to be adjusted?
>
> Has anyone done this?
>
> Tom
>
Easy way to find out, beg borrow or steal one of these GPS navigation
devices, they give your speed and are pretty much dead on.
01-28-2007, 12:36 AM
#35
Guest
Posts: n/a
Re: Tires and speedometer
"tk" <thomas_kessler@comcast.net> wrote in message
news:1169848358.200219.234310@j27g2000cwj.googlegr oups.com...
>I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> wheels and tires. Does my speedometer need to be adjusted?
>
> Has anyone done this?
>
> Tom
>
Easy way to find out, beg borrow or steal one of these GPS navigation
devices, they give your speed and are pretty much dead on.
01-28-2007, 12:36 AM
#36
Guest
Posts: n/a
Re: Tires and speedometer
"tk" <thomas_kessler@comcast.net> wrote in message
news:1169848358.200219.234310@j27g2000cwj.googlegr oups.com...
>I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> wheels and tires. Does my speedometer need to be adjusted?
>
> Has anyone done this?
>
> Tom
>
Easy way to find out, beg borrow or steal one of these GPS navigation
devices, they give your speed and are pretty much dead on.
01-28-2007, 12:36 AM
#37
Guest
Posts: n/a
Re: Tires and speedometer
"tk" <thomas_kessler@comcast.net> wrote in message
news:1169848358.200219.234310@j27g2000cwj.googlegr oups.com...
>I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> wheels and tires. Does my speedometer need to be adjusted?
>
> Has anyone done this?
>
> Tom
>
Easy way to find out, beg borrow or steal one of these GPS navigation
devices, they give your speed and are pretty much dead on.
01-28-2007, 11:45 AM
#38
Guest
Posts: n/a
Re: Tires and speedometer
My TJs one came right with 31s.
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
01-28-2007, 11:45 AM
#39
Guest
Posts: n/a
Re: Tires and speedometer
My TJs one came right with 31s.
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
01-28-2007, 11:45 AM
#40
Guest
Posts: n/a
Re: Tires and speedometer
My TJs one came right with 31s.
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
Dave
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45ba98dc$0$5336$9a6e19ea@unlimited.newshostin g.com...
> The funniest one was my CJ7's speedometer. It became proper with 33"
> tires for some reason. It had 31's on it when I got it and it was slow
> to the real speed. I would be doing a real 60 when the thing read 65.
>
> I think someone swapped a gear to go to 31's from the 215's when 30's
> would have been right for the speedometer...
>
> Mike
>
> Jeff Strickland wrote:
> > I agree. Sorta.
> >
> > If the factory fitment of speedo gear was to accomodate the largest
> > factory tire, then with the small tires on the stock models, the speedo
> > should be fast, they should read considerably higher than the actual
speed.
> >
> > If the speedo gear for the stock base-models is selected properly for
> > the tires, then changing the tires should result in an error where the
> > speedo reads slow with the new tires.
> >
> > Your experience with the XJ was such that you swapped a tire that was
> > nearly 30 with one that was 30, and the error that caused dialed the
> > speedometer's accuracy in almost perfectly. (I had a similar experience
> > with my BMW, by the way.) But, the OP is making a drastic change from a
> > 26.5" tire to a 30. This is 3" different in diameter, and 9" in
> > circumference. That's a large difference, and the speedo should
> > logically not be able to display the actual speed anymore.
> >
> >
> >
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:45ba8063$0$6662$9a6e19ea@unlimited.newshostin g.com...
> >> You need to find a measured mile or use a GPS to see what it is now.
> >> I have found that Jeep speedometers are calibrated for the largest
> >> stock tire size so yours might be right on now.
> >>
> >> Our XJ's became right on with 235's which are almost 30" tall.
> >>
> >> Mike
> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> 88 Cherokee 235 BFG AT's
> >> Canadian Off Road Trips Photos: Non members can still view!
> >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> >> (More Off Road album links at bottom of the view page)
> >>
> >> tk wrote:
> >>> I upgraded to alum canyon wheels and 30" tires from 195/75R15 steel
> >>> wheels and tires. Does my speedometer need to be adjusted?
> >>>
> >>> Has anyone done this?
> >>>
> >>> Tom
> >>>
> >
