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Widest tire for 21" OEM rear wheel

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Dec 24, 2021 | 06:31 PM

Zerocarpileup

Thread Starter

Senior Member

Hey guys what's the widest we can go on a w166 21" ML63 rear? Just saw a X6 with really wide tires and it looked awesome. Also any potential problems i could run into using a wider tire?

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Dec 25, 2021 | 03:49 PM

threeMBs

MBWorld Fanatic!

Quote:

Originally Posted by Zerocarpileup

Hey guys what's the widest we can go on a w166 21" ML63 rear?

On stock 21x10 - 305/35R21

Quote:

Originally Posted by Zerocarpileup

Also any potential problems i could run into using a wider tire?

These tires are very expensive (at least $2K+ every 10K miles or less), very difficult to find in stock and extremely limited choice.

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Feb 4, 2022 | 03:38 AM

Solo wing

Super Member

Quote:

Originally Posted by Zerocarpileup

Hey guys what's the widest we can go on a w166 21" ML63 rear? Just saw a X6 with really wide tires and it looked awesome. Also any potential problems i could run into using a wider tire?

Just make sure to have the same tire size all-around, otherwise this would damage the AWD system.