tire fitment question
I am looking to buy a staggered set of 17" MB rims 17x7.5 & 17x8.5...offset ET37......what tire sizes would fit on this set of wheels with out causing any issues.....
suspension is stock ...



javvy
Last edited by Javvy; Aug 5, 2013 at 01:11 PM.
non-staggered setup
Front:
17x7.5 ET35/36/37 Tires: 225/45R17
Rear
17x7.5 ET35/36/37 Tires: 225/45R17
Staggered setup
Front:
17x7.5 ET35/36/37 Tires: 225/45R17
Rear:
17x8.5 ET30/34 Tires: 245/40R17
205/55-16 diameter 24.9" revs/mile 811
225/45 diameter 25" revs/mile 808
245/40 diameter 24.7" revs/mile 816
255/40 diameter 25" revs/mile 806
For those that need to figure out equivalent tire sizes : http://www.miata.net/garage/tirecalc.html
For our W203/CL203,... 255 width for rear are not on the list of recommended tire size for 17" from Mercedes, AMG, Brabus or Carlsson.
But they do recommend 255 on larger rims as follow,...
Lower profile 255/35R18 for rear are on the list of recommended tire size for 18x8.5" ET30/34
Lower profile 255/35R18 for rear are on the list of recommended tire size for 18x9.5" ET35
Interestingly,... Brabus has even wider 265/30R19 recommended tire size for 19x9.5 ET35
Thus, we know with 255 & even 265 wide tires will fit with the proper offset,... without any modifications required.
http://www.mercedeswheels.net/
BTW,... with my 245/40/R17 tire in the rear,... being about 2.4% smaller circumference it should be,... that means my speedometer should be about 2.4% off,... while I'm travelling at 2.4% lower speed than it says. Hmmm,... how should I test that? I'll need to compare my in car speedometer to a speedometer on the side of the road,... which are usually located in school zones with posted 40km/hr speed limit,... I'll have to drive by at 100km/hr to properly test that 2.4% difference!
And risk a heavy fine, loosing my driver license and having my car impounded! 

Last edited by SunnyRayToronto; Aug 7, 2013 at 11:59 PM.
Oddly enough, my analog speedo shows a speed 1mph slower than the digital speedo.
It's as if you have to read the analog speed from the top of the needle, not from the middle.


