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Old 06-01-2015, 03:54 PM   #1
EM1/SS
 
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Question on alignment and tire wear

I have mostly BMR bushings, toe rods, and trailing arms on my SS. After I changed to these I went with the Pedders street performance alignment. The rear alignment specs are not that much different from the OEM, rear camber went from -0.4 to -0.5, but I went through a set of rear P Zeros in 3300 miles. I do not drive the car too aggressive (I don't think I do). They look like the wear is somewhat even. The outer edge is a little lower than the rest, but not by much.

Do I have some other problem or are the tires just that soft? I see others getting 15k or more.
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Old 06-02-2015, 06:07 PM   #2
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I sent this in a PM to justice Pete a few weeks ago and never got a response. Any one?
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Old 06-02-2015, 06:22 PM   #3
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3300 miles on Pzeros is a little low. They should be able to get at least 15-20k miles before being replaced. Is is both front and rear wearing so fast?
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Old 06-03-2015, 01:31 AM   #4
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Most likely a toe issue, toe is what will kill tires, not so much camber. I run -2.1 camber in front of my car and haven't noticed any major wear on the front. If you have a lot of toe though it will eat tires very quickly.

I've put well over 1k miles, had almost 4 hours at VIR and 2 autocrosses on a new set of M/T Street comps and they're looking just fine even with the -2.1 camber up front, and I have close to -1 in the back, but very little toe.
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Old 06-03-2015, 06:46 AM   #5
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Quote:
Originally Posted by Destructo09 View Post
Most likely a toe issue, toe is what will kill tires, not so much camber. I run -2.1 camber in front of my car and haven't noticed any major wear on the front. If you have a lot of toe though it will eat tires very quickly.

I've put well over 1k miles, had almost 4 hours at VIR and 2 autocrosses on a new set of M/T Street comps and they're looking just fine even with the -2.1 camber up front, and I have close to -1 in the back, but very little toe.
+1

Once upon a time, my LCA bushing in the front of my car went out and affected my toe settings. It ate through my tires in no time.
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Old 06-03-2015, 01:11 PM   #6
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The fronts are fine it's the backs I have trouble with. I had it aligned to the pedders spec's 2 years ago. I watched the guy do it and he got it right in. The spec's call for 0.10 total rear toe. That does not sound like a lot.
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Old 06-03-2015, 02:26 PM   #7
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Quote:
Originally Posted by Destructo09 View Post
Most likely a toe issue, toe is what will kill tires, not so much camber. I run -2.1 camber in front of my car and haven't noticed any major wear on the front. If you have a lot of toe though it will eat tires very quickly.

I've put well over 1k miles, had almost 4 hours at VIR and 2 autocrosses on a new set of M/T Street comps and they're looking just fine even with the -2.1 camber up front, and I have close to -1 in the back, but very little toe.
Quote:
Originally Posted by kyle@ridetech.com View Post
+1

Once upon a time, my LCA bushing in the front of my car went out and affected my toe settings. It ate through my tires in no time.
+2

Quote:
Originally Posted by EM1/SS View Post
The fronts are fine it's the backs I have trouble with. I had it aligned to the pedders spec's 2 years ago. I watched the guy do it and he got it right in. The spec's call for 0.10 total rear toe. That does not sound like a lot.
The alignment can get knocked out of spec. Those tires lasted me 4K and I tracked them when I first got my Camaro. I'd have the alignment rechecked.

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Old 06-03-2015, 03:38 PM   #8
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Yeah, 2 years is a long time to go without an alignment, it's most likely out of spec now. I think it's typically recommended to get it re-aligned about every 6 months. Honestly I go about a year though without any issues normally.

Pot holes and rough roads will eventually just knock it out of spec.
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Old 06-04-2015, 06:38 PM   #9
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I'll get it aligned again and see if it was off.
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Old 06-13-2015, 08:43 AM   #10
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It was the rear toe that was out.
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