Hey,

I got my new custome tunes and the speedo is off abvout 6-7 mph. Just curious if someone could help me out with this.

I have

265/70/17

Best I can come up with is about 638 Rev's a mile. Can someone help me verify this.

Thanks
Tom

 

Take a visit to Tire Rack's web site and you can do this yourself. You can look up the tire you have and when you go to "specs" it will give you the revolutions per mile of your tire...If your tuner gave you this option, the revolutions per mile will be in 5 mile per hour increments..