LVDell

Anybody know where you can look up tire diameter or running circumference (distance for one revolution)??? That would probably be the ticket to settle this debate. Or you can actually calculate the diameter of the wheel/tire buy combining the wheel size and profile, then solve for the circumfrence. Probabaly more accurate to look it up since you will be combining standard and metric and most rounding can affect this calculation and not give the perfect answer.

Viken

http://www.powerdog.com/tiresize.cgi

stiles_s

Here's a reallly good one, allows you to compare a couple sizes easily: http://www.miata.net/garage/tirecalc.html