ML320 Tires - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 01-23-2013, 08:17 AM Thread Starter
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Date registered: May 2010
Vehicle: 2000 ML320
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ML320 Tires

It's time for new tires. I've owned my 2000 ML320 for almost eight years, and have always used the recommended 255/65/16 tires. QUESTION: Would it be okay if I put 255/70/16 tires on her this time?-- or is 255/65/16 the only way to go (for traction purposes and whatnot)?

The only reason I ask is because I'm kind of running on bald tires at the moment, and the Discount Tire down the street said it'd take 3 - 5 days to get four matching 255/65 tires, BUT they do have four matching 255/70s in stock and they can be on by this afternoon. They claim the 5mm difference shouldn't be a problem for the vehicle, BUT I thought I'd ask some Benz pros first.

Let me know. Thanks.
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post #2 of 3 (permalink) Old 01-23-2013, 05:51 PM
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It's been few years since I quit driving M class, but I remember couple of members driving on tires about 20% bigger, what messed up their spedo, but gave the extra edge in mud and stone.
5 mm tire diameter difference is kindergarten comparison. People who know something about the tires always compare rpm.
I would wait couple more days for the right tires, unless you will get exceptionally good deal on the old stock.
Assuming you know what old stock means in long use?
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post #3 of 3 (permalink) Old 01-23-2013, 10:03 PM
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The difference between 255/65 and 255/70 tires isn't 5 mm - those numbers represent the aspect ratio. 5% more sidewall height top and bottom will increase the tire diameter by about 25.5 mm or 1".

After 8 years, 3 or 4 days won't make much difference. Drive like a granny for that time, especially if the road's wet.
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