So I recently just bought 2 rear tires back in April, car is lowered 1.5" and have rear SPC camber kit, but I notice today that my tires are being worn down right down the middle. I am asking for help/feedback because they are almost bald. The car is perfectly aligned since i got it aligned when I got the brand new 2 tires for the rear. The front tires still have about 90% thread left and i bought those last year in May.

 

What is your air pressure in the rear tires? Have you checked to see that all your rear suspension components are intact and not bent or broken? Both tires worn more in the center on both tires in the same pattern? And for course, pics would be great.

 

I am actually at work right now, I notice when I went to lunch. Ill get some pics when I am off. The tire pressure last time i check it was 42, I think that can be the problem. But I also started noticing about a week ago that whenever I go over a bump or pothole my rear swerves as if I was fishtaling

 

Why are you running 7 PSI over the factory recommended pressure?

 

Always ran 40 all around without any problems, bought the car back in 09. Once I lowered in Jan of this year and added the rear camber kit is when the tires started to wear off faster, and like I mention above just recently the rear is starting to swerve. I am getting it check tomorrow by 714 Tires

 

At 42 psi you must feel even the smallest ripple in the road.

To add to BB's questions, are the rear tires different from the front (brand, model, size?). It's possible the old tires handled the higher pressure better, the new ones bowed in the middle causing your excessive tire wear.

I run the standard stock sizes for the S sedan (225/50/18 and 245/45/18 bridgestone re050a oem tires) at 34/35 PSI depending on ambient temp. On my lengthy road trip they were probably at 35psi (cold) @ 70°F. Even at this pressure, on less than ideal road surfaces (I80, I76, I70), I could feel everything. On a number of occasions ended up sitting in the passing lane because the right lane was too harsh.

 

The fronts and rears are differerent brands since I recently just bought the rears. Fronts are nexxen 245/35/20 and rears are dunlop sportmaxx gt 275/30/20. I been doing some online searching and from the info I been seeing my rears psi should be a lot less which can be the problem. But I still want to get it check as well since I dont like how the rears swerves as if it was fishtailing each time i go over a pot hole.

 

Do you have your alignment spec sheet? Strange that they would wear so fast even at the higher PSI. Like BB mentioned, good idea to check all your suspension components, might have nailed a pothole to bump something out of whack or had something come loose under there. Also how wide are your rear wheels? A wide tire on a narrower rim can wear as you described.

 

I've seen that type of wear happen due to over inflation and/or bad toe settings.