BFG tire size vs. performance calculator

[Jeff C.]

http://www.bfgoodrichtires.com/bfgapp/popups/demos/demos_pickuptruck_0.jsp

Cool chart that tells you how changing tire diameter will affect things like ground clearance, gear ratio, and speedometer reading.

 

[techno1154]

I did a comparison with the actual speed of my XJ and the RPM verses speed I am getting with the 30's is the most accurate yet, only 32 RPM above my actual RPM. :yelclap:

 

[1985xjlaredo]

very cool

 

[IslanderOffRoad]

doesn't work for me.

 

[Smittty9785]

me either

 

[steelmen]

works great for me

 

[Tim_MN]

Try this one - http://www.oly4x4.com/4x4calculators.htm

 

[mellowvision]

it's funny, I forget what the original size was.