C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

tire fitment question

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Old Aug 5, 2013 | 11:39 AM
  #1  
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13 Jeep JKU Sahara w/4" lift Kit & the works,2015 Toyota Sienna XLE,2013 Hyundai Sonata Hybrid
tire fitment question

car: 2002 C230 with stock suspension and stock tire 205/55/16...

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.
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Old Aug 6, 2013 | 12:45 AM
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From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
Typical Mercedes/AMG rims and tires size

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
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Old Aug 6, 2013 | 09:01 AM
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From: Toronto, Canada
2019 C300 Wagon; '75 Triumph TR6; previous: 2004 C230 6spd sold after 17 years of driving
does anyone know why the rears are 245/40 rather than 255/40 which would give the exact same diameter as the 225/45 fronts?

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
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Old Aug 7, 2013 | 11:52 PM
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From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
That's an interesting question,....

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.
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Old Aug 8, 2013 | 12:11 AM
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From: Austin, TX
2005 C230K(sold), Mk7 Jetta
GPS?

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.
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