Rear tires wear out super fast on AWD Cybertruck, could it be FSD?

[M0unt41nm4n]

Yeah thats certainly not normal for 6000 miles unless you launch it everywhere you go. In fact, I even think launching it all the time would not do that. IMHO you definitely have a problem and I would do a full court press on it. It makes me wonder if there is something wrong with your drive train and its slightly skidding.

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[CyberGus]

It makes me wonder if there is something wrong with your drive train and its slightly skidding.

Maybe the rear diff is locked!

 

[2000prerunner]

This is pretty common with a lot of Tesla’s actually. This is not a defect or mistake from the factory. Tesla probably sends their vehicles out with aggressive rear alignments (More negative camber, more toe in) which results in excessive tire, but produces exceptional handling, and safer ride characteristics. I don’t think this is exclusive to Tesla as other manufacturers like BMW and Audi also have this issue . If you drive behind any quality German car for example, pay close attention to how much negative camber they put in their rear tires.
If your goal is to save money, you can probably change the factory alignment and relax it to more econo shit box settings (or mimicking a rear solid axle). But if you value handling performance, stop being so cheap and keep wasting money on tires. Sorry. This is the sad truth and don’t let anyone convince you otherwise. Got pay to play

And for those of you who get more mileage out of your tires, you are probably a very responsible and slow driver! Good for you .

 

[2000prerunner]

Yeah thats certainly not normal for 6000 miles unless you launch it everywhere you go. In fact, I even think launching it all the time would not do that. IMHO you definitely have a problem and I would do a full court press on it. It makes me wonder if there is something wrong with your drive train and its slightly skidding.

This is normal for me on my CT and m3P. 10k miles in my normal tire change interval, even with rotating at 3k . Yes the guy is probably driving aggressively like me

 

[CTOWannabe]

This is normal for me on my CT and m3P. 10k miles in my normal tire change interval, even with rotating at 3k . Yes the guy is probably driving aggressively like me

so you’re are going that bald in less than 10k miles! Interesting. Thanks for the data point.

 

[M0unt41nm4n]

Maybe the rear diff is locked!

That would do it!

This is normal for me on my CT and m3P. 10k miles in my normal tire change interval, even with rotating at 3k . Yes the guy is probably driving aggressively like me

Dunno... I am at 12K on mine... had 1 rotation and I still have the full tread. Something is different whether its endless launching or the drive train is having issues. Being that bald in 6K miles is certainly not normal.

 

[CTOWannabe]

Maybe the rear diff is locked!

That would definitely do it but I don’t think it’s possible for the diff to lock in FSD. Also I’ve never locked the diff myself. So it would have to be some weird glitch.

 

[2000prerunner]

so you’re are going that bald in less than 10k miles! Interesting. Thanks for the data point.

Yes. On the CT it was the factory tires , then 2 sets for KM3s. The KM3s also cup badly before going “bald”.

On the m3P , the original Perelli’s, now 5 sets of Michelin pilot sport 4s.

40 psi for both vehicles

 

[CTOWannabe]

Yes. On the CT it was the factory tires , then 2 sets for KM3s. The KM3s also cup badly before going “bald”.

On the m3P , the original Perelli’s, now 5 sets of Michelin pilot sport 4s.

40 psi for both vehicles

super interesting. Do yours wear evenly down.

I’ve now determined all my excessive wear happened somewhere in the last 1000-1500 miles. Before then it was roughly wearing even with the fronts.

 

[CTOWannabe]

Small update.

​

I’ve gone about 300 miles on the new tires. They started around 9/10mm. So far they seem the same. Will be taking measurements on the trip home. fingers crossed.​

Trying to do near 100% fsd home.​

 

[CyberGus]

That would definitely do it but I don’t think it’s possible for the diff to lock in FSD. Also I’ve never locked the diff myself. So it would have to be some weird glitch.

True, I was referring to a failure of some kind. I think you'd know it if the diff was locked; turning a tight radius on asphalt would make quite the noise.

 

[M0unt41nm4n]

That would definitely do it but I don’t think it’s possible for the diff to lock in FSD. Also I’ve never locked the diff myself. So it would have to be some weird glitch.

Indeed. That depends on whether there is a software glitch that turns on the diff locks or if it's even only partially turned on behind the scenes. I certainly wasnt suggesting that you turned them on, but rather you have something likely wrong with it. Let's hope it was just a defective tire. Also, maybe consider buying a set of tires that have a 50k mile warranty as you would get a large part of the new tires paid for. Unfortunately, IIRC, Tesla Goodyears don't have a warranty.

 

[CyberGus]

Indeed.

 

[ChronoDog]

Had a dangerous event on my 2025 CT. I left on a road trip on 1/1 with about 6000 miles on the odometer. I checked the wear on the tires at the time and wear seemed normal and even on all 4 tires.

After about 4000 miles on the trip I checked and the rears had worn bald! I used fsd over 90% of the driving on the trip, and before that I had used it only maybe 30% of the time.

I crawled back from a reststop at 55mph to Vegas service center. In that 47 miles it had worn one tire down to the belts!

The dealer says because they see I have applied 100% power on several occassions (what Tesla owner hasn’t) that I need to pay for 2 tire replacement. I don’t mind or care about paying, but what freighters me is (at least preliminarily) they think that is the cause and no way is that the cause. I have not peeled out in the car and even if dove fast all the time, that wouldn’t explain this huge disparity in rear tire wear in such a short time—no way could such disparate wear even with high speed highway driving be a normal expected outcome. Particularly since I drove more aggressively the first 6000 miles which experienced even wear, than the almost total fsd driving during the last 4000 miles of the trip which experienced crazy high wear on the rear tires.

To me it says something like the alignment or somehow dragging the rears or maybe a wobble in rear wheel steer would be necessary to effectively have sanded the rears so thoroughly down. My concern is if they are not curious to figure it out and I still have 2000+ miles to go to finish the trip.

I got at the service center and that was their preliminary finding as they were closing so my hope is that perhaps the techs didn’t want to jump to any conclusions that close to closing. I was told they would investigate more in the morning.

I’ll post some pictures of the wear below. I searched around and did see this thread that seems unresolved.

TLDR curious if anyone has had a similar experience and determined what may be the cause of such extreme disparity in wear of the rear tires?

Thanks!

(Photos in next post below)

 

[ChronoDog]

I got 6k miles out of the tires on my AWD. I put some Axis RT's when i swapped the rims out so we will see how these work out.

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