I have 32" tires on my CJ7. Assuming that the tires were added with nothing
else done to tranny, etc, will the speedometer be accurate? What size is
stock with a 85 CJ7?

 

>I have 32" tires on my CJ7. Assuming that the tires were added with nothing
>else done to tranny, etc, will the speedometer be accurate?

No.

>What size is
>stock with a 85 CJ7?
>

29", I think.


Robert Bills
KG6LMV
Orange County CA

http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
http://www.RobertBills.com

 

How far off will it be? How can I calculate it?

"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20030722225017.24310.00000303@mb-m16.aol.com...
> >I have 32" tires on my CJ7. Assuming that the tires were added with
nothing
> >else done to tranny, etc, will the speedometer be accurate?
>
> No.
>
> >What size is
> >stock with a 85 CJ7?
> >
>
> 29", I think.
>
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com

 

((big tire size/small tire size)-1)*100 = percentage speedo will be off

so
32/29=1.103-1=.103*10= 10% approx. (the speedo will read slow)

So if these are the tire sizes you have, then at 60mph your speedo will be
off by 6mph.

If you go from bigger to smaller tires for some reason, the speedo will read
fast.

Chris



"Joe" <jo_ratner@yahoo.com> wrote in message
news:mbnTa.17604$Mc.1335436@newsread1.prod.itd.ear thlink.net...
> How far off will it be? How can I calculate it?
>
> "Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
> news:20030722225017.24310.00000303@mb-m16.aol.com...
> > >I have 32" tires on my CJ7. Assuming that the tires were added with
> nothing
> > >else done to tranny, etc, will the speedometer be accurate?
> >
> > No.
> >
> > >What size is
> > >stock with a 85 CJ7?
> > >
> >
> > 29", I think.
> >
> >
> > Robert Bills
> > KG6LMV
> > Orange County CA
> >
> > http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> > http://www.RobertBills.com
>
>