C charlloots SMO-CUM Joined Aug 1, 2002 Jan 25, 2005 #1 check out the caculator on this site www.1010tires.com takes care of the guess work
B bogie1 Member Joined Sep 11, 2003 Jan 27, 2005 #3 Just what I was looking for. Now I know why my speedo is off so much--Tks