I love my Model S but if you drive an S or X like me, you may have noticed the inner rear tires wearing out way too quickly. Even after having the vehicle aligned, the problem most often remains. With Teslas, rear inner tire wear is typically due to a combination of negative toe (where the wheels toe outward in a slight “V” shape) and excessive negative rear camber (inward tilt from the top of the wheel). Only toe is adjustable on the Tesla S and X and not very much at that. The rear wheel camber is not adjustable from the factory which is why having an alignment performed usually doesn’t help. While some negative camber is essential for good traction during cornering, having too much can wear out the inner tire’s edge. This creates a critical situation where many of us have experienced the tire quickly lose air pressure or completely blow out without warning, destroying a very expensive tire and wheel and possibly causing an accident.
It can be a bit of an illusion. A quick look or feel of your rear tire tread and everything seems fine. It’s not until you lie on the ground and look way back at the very inside edge that you see how bad your tire’s condition is. Many Tesla S and X owners like myself are getting only 5-10 thousand miles out of the rear tires. This means spending anywhere from $400 – $1,200 for a pair of new tires every few months. Not to mention spending time at the tire shop way too often.