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I have a 2021 GLS450. Living in the Boston area, I wasn't satisfied with the 20k miles that I got from my OEM 21" staggered wheels. So I sold them and bought a set of 20" wheels and got Michelin CrossClimate2 in the same size on all 4 corners. I rotated the wheels every 5k miles.
I'm now at 32k miles on the tires and they are getting really noisy. I had them rotated and the tire shop said the tires are cupping and wearing unevenly. Today I had them "road force" balanced and the tires on the driver's side (front and rear) were both really out. The shop remounted them and put the biggest offenders on the rear axle and told me to stop rotating the tires. It's definitely better with less vibration, but I'm thinking this is the end for this set of tires.
Definitely better wear 20k vs 32k miles and the Michelins had a much better ride (and were quieter) until last month. I will stay with the 20" wheels although I may increase the time between wheel rotations to every 7,500 miles.
I'm debating getting another set of the CrossClimate2 tires, or going back the the Nokian All weather tires that I used to run on my 2013 GL. Funny enough, I decided to try something different because I hated how noisy the Nokian tires got towards the end of their lifespan. I could never reach the tire warranty mileage before the noise drove me to replace them. Seems these Michelins exhibit similar behavior. Enkei XM-6, 20" wheels still look great
Nokian WRG5 was just announced 18 months ago and CC3/ CC3 Sport was just announced a month or two ago. Just so you're aware of what's on the market for All Weather tires. I think the newer GLEs with 19" rims come with CC2 as OEM. At least I saw one just yesterday with 19" CC2s and it said M0 on the tires.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
The 20 inch Wheel experiment
