Thread: Tire size
View Single Post
      09-05-2007, 10:06 PM   #1
GregW / Oregon
Commander-In-Chief
 
Drives: 2015 M4 Coupe, 2012 ML350
Join Date: Nov 2005
Location: Lake Oswego, OR

Posts: 7,564
iTrader: (2)

Garage List
Tire size

Sorry if this is old news, but I just looked closely at the E92 M3 specs in the German press release, and discovered the rear tires are larger in diameter than the fronts.

Tyres, front/rear 245/40 ZR18 / 265/40 ZR18
Rims, front/rear 8.5J x 18 EH2+ IS 29 aluminium, forged/9.5J x 18 EH2+ IS 23 aluminium, forged

According to my calculations, since the aspect ratio is same front and rear, the rears are .40 x 20 mm x 2 = 16 mm ( 5/8") larger in diameter. This is confirmed by Michelin specs which show .60" difference (809 vs. 790 rpm) Anyone else notice this?
__________________

Greg Lake Oswego, Oregon, USA
2015 M4 Coupe - Silverstone/Sakhir/CF
2012 ML350

Last edited by GregW / Oregon; 09-06-2007 at 11:49 AM.
GregW / Oregon is offline   United_States
0
Reply With Quote