BAWC Forums

This calculator will show you an outline of your current size tire compared to an example you type in. It also will give you a printed listing of the sidewall, radius, diameter, circumference and revolutions per mile of each tire. This calculator has helped me many times over the years with tire clearance, mph/rpm, and other areas. This will also help determine circumference to show the effect of staggering tire sizes on awd cars. (How much further one tire rolls per revolution compared to another)

http://www.discountpartcenter.com/tirecalc.html

Save it to your favorites list, it's a great tool.

Support the people who made that script!

http://www.miata.net/garage/tirecalc.html

This is the original site for that piece of software.