W213 AMG Discuss the W213 AMG - 2017 to present

265/35R20 vs 255/35R20 front tires

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Old Mar 5, 2018 | 09:17 PM
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265/35R20 vs 255/35R20 front tires

The diameter of a 255/35R20 tire exactly matches the 295/30R20 tire used in the rear. Why is the slightly larger tire, namely the 265/35R20 used instead. The reason that I'm asking is that I want to put the new Michelin Alpin tires on the car when the current oem pirrelli tires wear out.
The Michelin tires do not come in the 265/35R20 but do come in the 255/35R20 along with the 295/30R20. Would there be a problem using the slightly smaller tire for the front fitment?
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Old Mar 5, 2018 | 10:39 PM
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Go to www.willtheyfit.com and plug your numbers in. A 30 aspect ratio on the 295 though will leave you with even less sidewall than the 35, be careful there.
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Old Mar 5, 2018 | 11:29 PM
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The car will not handle the way it's meant to. Back end will be jacked up a little bit. I just plan on going with the same michelin super sports that came on the car when I need tires. Hopefully get at least 15K miles out of these ones, I'm at 4 K miles now, might be another couple of years.
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Old Mar 6, 2018 | 10:02 AM
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Originally Posted by 2012 merc amg
The car will not handle the way it's meant to. Back end will be jacked up a little bit. I just plan on going with the same michelin super sports that came on the car when I need tires. Hopefully get at least 15K miles out of these ones, I'm at 4 K miles now, might be another couple of years.
I am not looking to change the rear tires. They are already 295/30R20. My question was reducing the front from 265/35R20 to 255/35R20. The diameter and sidewalls of the 255 tire is within .05" of the rears. Not sure why MB is using a slightly larger tire for the front.
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Old Mar 6, 2018 | 05:50 PM
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I think it has to do with the added .2" in the sidewall. That little bit will most likely provide some added protection for potholes etc..

The 255/35 is an exact match diameter wise, maybe tougher to get in Pirelli and Michelin considering they are the two sources or speed rating issue.


Last edited by nynd; Mar 6, 2018 at 06:30 PM.
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