Tire calculator

[Gubni]

I found this great tire calculator today. It will allow you to convert tires sizes and tell you speedo differences and other things.

http://www.net-comber.com/tirecalc.html

[Spartan081681]

http://www.marlincrawler.com/java/getspd_calc.html
Here is another good calculator, even has a blank for a second transfer case. You need to find out what gears you have in the whole drivetrain for it, but it works great to see how adjustments play out.

[Andy1]

You can put in different tire sizes, gears and speed to calculate the RPM's. It also has a list stating different transmissions and transfer cases with the ratio to choose from.

http://members.shaw.ca/snowjeep/tirecalc.htm