Maritime said:From Avon site for roadrunner AM26:
Tire Size speed Rec Rim Min max
AM26 130/70V18 63V MT3.50 3.00 - 4.00
I wouldn't do it.
cosworth said:I know 120/90 is the max on a rear 2.15 18 rim. So dropping down to a 70 should work no?
hillsy said:The second number is the aspect ratio (IE: height) of the tyre. Changing that doesn't affect the width of the tyre or make it fit better on a smaller rim.