Q re: different tread depth on drive wheels
 

Got a screw on one my rear PSS, sidewall too damaged and cannot be repaired.

The good tire has 7/32nds left with a new PSS having 10/32nds. My car also has an open differential. Can I get away with ordering a new PSS or should I have Tire Rack shave the new PSS down to 7/32nds also?

Thanks!

edit: are there any local shops that can shave tires?

Assuming your wear pattern is even (ie alignment etc are teh same) it should make no difference.

What kind of car you drive? If you are really concerned you can make sure the tires on your most weighty end are the same and swap the dissimilar one on the less heavy end.

I drive a 335i. Wear is even, the tires are only a year old.

I can't swap tires front to rear because the rears are wider.

I heard that tires on the drive wheels need to have the same tread depth or it could cause damage to the differential or suspension components.

Okay, you hear things (eg Ebola kills people), but have you ever thought about it through critically whether it affects you or not?

Assuming you are replacing with the same tire sized tire, the different is +/- 2/32" what is your diameter? 19" if not 20"?

I read other websites and articles that talk about this and most say that running different tires with different tread depth is harmful. Manufacturers also have their own tolerances but I couldn't find the ones for BMW, only for Subaru, Porsche, etc.

The wheels are 19" and the tires are 265/30/19.

I'm assuming that you are saying that its fine to run a new PSS along with the used one on the rear?

I work at costco tire centre. If the tread depth the two tires on the same axle is 7/32 or more (and one of them is damaged and needs replacing) we will road hazard only the damaged tire. If the remaining tire is 6/32 or less, both tires on that axle will need to be replaced.

Thanks for your input! Luckily I'm at 7/32 and maybe a bit more. So that means no need to shave the new tire.

I personally would not shave the tire. Others may suggest different stuff, but for our tire shops that is the policy.

Obviously, when you buy a replacement tire make sure it is (or isn't) a runflat, have it the same load and speed rating etc etc. pretty much the only thing that shouldn't be identical is the DOT number having different dates. Everything else should be

Yeah, I'm buying the exact same tire. Only difference is one will be new and the other slightly used.

Why have a shop shave the tire when you can accomplish the same thing and have a little fun? lol

Seriously though, the difference is negligible. Run the new one on the RR and don't feel bad doing a peg-leg burnout cause you're just evening out your tread depth. :eek5r:

Lol how do you do a peg legged burn out?

Peg-leg burnout = one tire fire

http://www.johnhroberts.com/burnout2.jpg

The one wheel peel. My gti was the king of the one wheel peel lol.

buy a new pair and put the good used one on craigslist. i'm sure there is another owner out there who is in the same boat as you are trying to find a single replacement or is doing a lease return. or keep it as a spare for the next time you get a bad puncture.

One tire fire :lol

Haven't heard that since my buddy used to try and destroy his dad's old dodge 20 years ago.

Was it totally rad or was he a harsh hoser about it? :pokerface:


:fullofwin:

Just make sure you don't have a 1.5 PSI difference in your tires else this could happen.

That guy made the front page of bimmerpost a while back.

Yeah cause it was the worst burnout fail since that dude with the SRT Ram that flipped his truck...

I'm gonna have to nominate this tool

don't :(