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Old 08-08-2013, 12:14 PM   Thread Starter #1
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Default Cupping Rear Tires

Wassup guys, I have a 04 se with 73, 000 miles, I'm not dropped, I'm on 20's, recently changed all struts/shocks and seen cupping on inner part of both rear tires, since ABS light has been coming on and off and I noticed a CV boot ripped I took it to the dealer, they said actuator for the ABS light, gotta order the part and they'll do the CV boot at the same time and they did an alignment while in shop. Do guys think it could be the alignment ? (camber arms) wheel bearings? And ive had that airplane or humming sound for some time now.
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Old 08-08-2013, 03:48 PM   #2
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Default Re: cupping rear tires

what do you mean by cupping
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Old 08-08-2013, 04:08 PM   Thread Starter #3
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Default Re: cupping rear tires

Originally Posted by Kenny View Post
what do you mean by cupping
There's high spots and low spots on the inside parts of threads.
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Old 08-08-2013, 04:45 PM   #4
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Default Re: Cupping Rear Tires

Was cupping present prior to shock replacements or afterwards?
Cupping is usally an indicator of worn shocks. Camber arms will help eliminate this also.
The humming could be from the high/low spots or bearing/hub.
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Old 08-08-2013, 05:24 PM   Thread Starter #5
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Default Re: Cupping Rear Tires

Originally Posted by BurntOrangeAppeal View Post
Was cupping present prior to shock replacements or afterwards?
Cupping is usally an indicator of worn shocks. Camber arms will help eliminate this also.
The humming could be from the high/low spots or bearing/hub.
Humming has been there for awhile, cupping was present prior, I noticed it while I was changing shocks, you think I need the camber arms even if I'm not lowered? I appreciate the feedback, thanks.
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Old 08-09-2013, 12:26 AM   #6
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Default Re: Cupping Rear Tires

Originally Posted by HawaiiMAX808 View Post
Humming has been there for awhile, cupping was present prior, I noticed it while I was changing shocks, you think I need the camber arms even if I'm not lowered? I appreciate the feedback, thanks.
You should get it within specs even with 20s. You need to look at the allignment paper when you did your allignment to see where you are sitting spec wise on the rear suspension.
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Old 08-09-2013, 02:59 PM   Thread Starter #7
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Default Re: Cupping Rear Tires

Originally Posted by BurntOrangeAppeal View Post
You should get it within specs even with 20s. You need to look at the allignment paper when you did your allignment to see where you are sitting spec wise on the rear suspension.
I'm gonna check into this, dealership told me he's gonna hold onto paperwork until they fix the CV boot and ABS actuator... thanks for the help...
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Old 08-16-2013, 01:38 PM   Thread Starter #8
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Default Re: Cupping Rear Tires

Originally Posted by BurntOrangeAppeal View Post
You should get it within specs even with 20s. You need to look at the allignment paper when you did your allignment to see where you are sitting spec wise on the rear suspension.
Update: car is getting ABS actuator and driver side inner CV boot changed today, they gave me the paperwork for the alignment. Front camber and caster was within specs, the front toe was off. The rear toe was within specs but camber was off. Its been about a week since alignment and still humming?
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Old 08-16-2013, 09:01 PM   #9
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Default Re: Cupping Rear Tires

As I stated above, the cupping is caused by worn struts/shocks and/or allignment.

The humming is caused by either bad bearing/rearhub or the tire (blocked)in your case. You need to correct both. You corrected the allignment. Now you need to correct your tires.
Hint: if you want to play yourself, install a spare tire instead the most (blocked)tire or instead of the tire where from the humming occurs from. If the noise goes away its your tire. If it does not, you need a rear hub or front bearing replaced.
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