MX-3.com

i timed out, server took too long to respond, i'll try later.

Great site..

Finally!

I've used this one: http://www.miata.net/garage/tirecalc.html for a while now, but sometimes it will give an error and revert to a more basic calculator. Extremely annoying, and unreliable when I've needed it in the past.

Now I have another option, thank you!

Happy to help

and this is not for everybody I know but a great database all the same
http://tyrestretch.com/