[hello spaceman]

My 2017 M2 is due for a new set of fronts. (I've had the car about a month now)

Pulled into the garage last night with my tyre depth gauge and was horrified to find that the inner shoulder on the front right (driver's side; RHD) tyre was down to the cords. The front left left was completely bald.

On both tyres, the inner shoulders are the only badly worn sections. depth gauge showed ~2.4mm on the outside shoulders and around ~4mm at the centre ribs. (Tyre in question is PS4S; *non* star marked)

The tyres have around 21k miles on them since they were installed.

So the question:
1. Is uneven tyre wear a known trait? Or is it uncommon?
2. What could the cause be? From what I've read the front camber isn't adjustable...
3. Will I see even wear by using the star marked PS4S on the front? I see that these have a different construction with multiple compounds.

Hopefully somebody has some answers or insight.

[DanG]

Sounds like you need a four wheel tire alignment. The front camber is adjustable.

Another cause could be very hard cornering possible on a track.

Uneven tire wear is not a common problem but can happen with any car.

[hello spaceman]

Originally Posted by DanG

Sounds like you need a four wheel tire alignment. The front camber is adjustable.

Another cause could be very hard cornering possible on a track.

Uneven tire wear is not a common problem but can happen with any car.

Thanks for the info about the front camber. I guess I read wrong, initially.

PO never modified the car, not did he do any track work. I'm guessing there's just a little extra camber dialled in - will get it in for full alignment to look at that, after replacing the fronts.

[PackPride85]

Originally Posted by DanG

Sounds like you need a four wheel tire alignment. The front camber is adjustable.

Another cause could be very hard cornering possible on a track.

Uneven tire wear is not a common problem but can happen with any car.

Front camber is NOT adjustable without aftermarket camber plates. Toe IS adjustable.

To the OP: I had the same issue on my M2. The car was set to the high range of toe in from the factory. I’d recommend getting an alignment and have them adjust the toe so it’s more on the toe out end of the range.

[hello spaceman]

Originally Posted by PackPride85

Front camber is NOT adjustable without aftermarket camber plates. Toe IS adjustable.

To the OP: I had the same issue on my M2. The car was set to the high range of toe in from the factory. I’d recommend getting an alignment and have them adjust the toe so it’s more on the toe out end of the range.

Thanks, this is a bit more authoritative to me as you've had hands-on experience.
I'll have the toe adjusted.

[DanG]

Originally Posted by PackPride85

Front camber is NOT adjustable without aftermarket camber plates. Toe IS adjustable.

To the OP: I had the same issue on my M2. The car was set to the high range of toe in from the factory. I’d recommend getting an alignment and have them adjust the toe so it’s more on the toe out end of the range.

He is right. The toe is adjusted not the camber. You probably need an alignment as both of us recommended.

[///MPhatic]

Align every year if you think you need it or not.

[x233]

You need to check control arms & bushings first, and probably replace. Because what you describe is what happens when they fail. Then do the alignment.

[milarsa]

Normally, tires won't wear out that quickly. tunnel rush

[hello spaceman]

Originally Posted by x233

You need to check control arms & bushings first, and probably replace. Because what you describe is what happens when they fail. Then do the alignment.

Yeah I'll have these looked at, too.
Car only has 43k mi, with no history of track work, but who knows.

Thanks for all the replies.