Rear tire wear

[TheRedSlantnose]

The rear tires on my Cayenne GTS wear down much quicker than the front tires for some reason. I bought all four new, high-quality Michelin tires at 53,000 miles, and now after just about 7,000 miles, my rear tires are already bald while my front tires have barely worn down. I went to a tire shop and then a local Autobahn Porsche dealer to have it checked out, and they both told me it isn't normal for those high-quality Michelins to wear down that quickly. The Porsche staff also informed me that excessive wear on the rear tires is common on GTS's because of the weight shift upon acceleration. The Cayenne is my wife's daily driver, and she normally does city driving, so the tire wear mostly not being caused by heavy acceleration in this case is just unusual. The possibility of being caused by wheelspin is also ruled out because having all-wheel drive, it just very rarely if ever happens with my Cayenne.

Any other ideas as to what may be causing my rear tires to wear down quicker, or has anyone else had this happen with their Cayenne?

Thanks,

[Garrett]

It's not weight shift... there is a 62% rear torque bias in the 4wd system. So no wheelspin is needed to wear out the rear tires faster - every time the truck is accelerated the rears are working harder. Additionally, a GTS has a lot of torque with a low ratio rear end so it accelerates very strong from a stop, so that will also wear the rears faster. And on top of those 2 factors, city driving will kill rear tires even faster because there are frequent changes of speed, often from a low speed or stop which exacerbates the above issues. Hope that helps.

[TheRedSlantnose]

Okay, that makes sense, thanks!