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?
- posted
20 years ago
Tires and Speedometer
Loading thread data ...
- Vote on answer
- posted
20 years ago
No.
29", I think.Robert Bills KG6LMV Orange County CA
formatting link
- Vote on answer
- posted
20 years ago
How far off will it be? How can I calculate it?
- Vote on answer
- posted
20 years ago
((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