View Single Post
      02-14-2013, 07:47 AM   #47
Evice's Avatar

Drives: BSM 128i M-sport and '98 M3
Join Date: Apr 2009
Location: Somewhere here

iTrader: (1)

Originally Posted by speedfan View Post
Tyres: Michelin, front axle: 300-680-18, rear axle: 310-710-18

Can somebody explain the tire side please?

300in is the width. the next number is measurement for the tire's sidewall, which is the percentage of the tire's width.
So, according to my calculation, the tire's sidewall is 2,040in tall. WTH?!?! *confused*
That's for DOT tires, not slicks.

Also guys, Z4 GT3 and Z4 GTE are greatly different at this point. The preparation rules are different, and it almost creates $200k difference in the bill, GTE being higher. Think of 911 GT3 R or Cup vs. the 911 GT3 RSR...RSR is manically wider.
-- '09 BSM 128i - '98 E36 M3 - BMWCR IS #718
BMWCCA Instructor & 2013,2014 BMWCR I-Sport National Champion.