[Swifty1638]

again, width has nothing to do with it. it's overal diameter and how far a certain given point on the tire must travel before it's at said point again. Cut a tire and lay it out flat, now cut the same size (but different aspect ratio) and lay it next to it..it's gonna look like this..

___________
____________

THAT's what throws off the speedo. NOT width.

That being said, i'd say widest tire you could go that will fit. Winter though, i'd say narrowest.

-A. Swift