Race Tire Question
03-31-10, 07:08 PM
#2
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? 645 its the % of tire width for example a 315/35/18 is 315 mm wide and 35% of 315 mm in height and then on a 18 in rim. u got ur numbers fucked up a 285/645/18 would be like monster truck size.
03-31-10, 07:16 PM
#3
Per the thread in the race section, w/ race tires 645 is the actual diameter in millimeters. They don't do the aspect ratio thing like street tires. Divide by 25.4, and that's about 25.2". 285/30's are typically about 24.8" or so.
I have some Rolex GT Hoosiers, 280/640/18, and they appear to be both taller and wider than my 285/30/18 R6 DOT's.
I have some Rolex GT Hoosiers, 280/640/18, and they appear to be both taller and wider than my 285/30/18 R6 DOT's.
Last edited by ptrhahn; 03-31-10 at 07:18 PM.
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