Inside tire wear :(
Thread Starter
Three Wheelin'
Joined: Jun 2008
Posts: 1,599
Likes: 1
From: Boulder, CO
Inside tire wear :(
So I'm putting my car back together from the last project, and I noticed a 1" wear pattern on the inside of all 4 tires. It's pretty minor now, but guessing it will get bad quickly if I don't change something. Recently (my last diy) I installed PSS10s. I know that lowering the car changes the camber....but I did not lower the car that much. Maybe 1.25 - 1.5 inches. I had a 4 wheel alignment done at a pretty reputable shop.
Lots of you folks have lowered your cars way lower than mine. How do you guys keep your car from eating tires?
Since I need to get the car aligned again, are there any suggestions to mitigate this issue?
Bob-
Lots of you folks have lowered your cars way lower than mine. How do you guys keep your car from eating tires?
Since I need to get the car aligned again, are there any suggestions to mitigate this issue?
Bob-
Last edited by boulderbobo; Aug 21, 2009 at 02:42 PM.
Burning Brakes
Joined: Jul 2007
Posts: 763
Likes: 4
From: San Diego
I'll let the experts chime in on the alignment settings but I think it's the nature of the beast to get inner tire wear (at least on the rear). Camber and toe will impact the tire wear the most. Too much toe-in really can eat things up.
One thing I do on my rears to maximize tire life is to swap the tires halfway through their life.
One thing I do on my rears to maximize tire life is to swap the tires halfway through their life.
Rennlist Member
Joined: May 2006
Posts: 4,919
Likes: 7
From: Marietta, Ga
My tires did the same thing. My car has the ROW M030 w/Bilstein HD's.
I went back for a 2nd realignment, and my shop told me that while they were able to improve the alignment, they could not get it fully into spec, citing the lowered stance as the reason.
Can someone who knows for sure call BS on this? I find it strange that the car cannot be aligned to accommodate what is, after all, an official Porsche option.
I went back for a 2nd realignment, and my shop told me that while they were able to improve the alignment, they could not get it fully into spec, citing the lowered stance as the reason.
Can someone who knows for sure call BS on this? I find it strange that the car cannot be aligned to accommodate what is, after all, an official Porsche option.
Thread Starter
Three Wheelin'
Joined: Jun 2008
Posts: 1,599
Likes: 1
From: Boulder, CO
I can post a pic tonight.
I'll see if I can find the spec's on the alignment and post tonight.
I agree some where is expected. Mine seems excessive.
Bob-
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One thing I won't miss from the 993 was inside tire wear. Unbelievable how quickly you can go through a set of rears on a 993, even if properly aligned. Overly complex and finnicky rear suspension design, maybe someone will come out with a kit to backdate to the simple 964 design for the 993 cars 
Banned
Joined: Feb 2004
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From: SF Bay Area
One thing I won't miss from the 993 was inside tire wear. Unbelievable how quickly you can go through a set of rears on a 993, even if properly aligned. Overly complex and finnicky rear suspension design, maybe someone will come out with a kit to backdate to the simple 964 design for the 993 cars
Joe
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From: Sandy, UT/Fish Haven, ID
I had that issue a few years ago but since I had MO30's and HDs installed with an aligment, even wear on the tires---over the past 8000 miles.
My guesses are:
1. Bad Alignment
2. Good alignment gone bad---hit something, took a speed bump wrong, ect
I get about 8k out of my rear tires---thats consistent over the past 7 years and I dont know how many sets. 8k on rears, easily 16k on the fronts. 2 to 1 ratio is clock work with tires......for me that is.
My guesses are:
1. Bad Alignment
2. Good alignment gone bad---hit something, took a speed bump wrong, ect
I get about 8k out of my rear tires---thats consistent over the past 7 years and I dont know how many sets. 8k on rears, easily 16k on the fronts. 2 to 1 ratio is clock work with tires......for me that is.
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Joined: Feb 2004
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From: Roseville, CA
Toe issue. I can post pics of the 22K+ set of rears from the C4S, albeit with 100% stock suspension and height, that I removed the first of the year. Still just worn over 50%.
Even with the PSS9/lowering, the set of 2/3 worn tires that came with the 996 hollow spokes show hardly any further wear with the 2-3K I've put on the car so far this year.
Even with the PSS9/lowering, the set of 2/3 worn tires that came with the 996 hollow spokes show hardly any further wear with the 2-3K I've put on the car so far this year.
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From: www.rlsafespace.com
Too much negative camber+too much toe=Insane tire wear especially on the inside edge. I went through a set of PS2's in less than 500 miles with a bad alignment which had way too much toe.
Three Wheelin'
Joined: Oct 2006
Posts: 1,394
Likes: 3
From: Tampa, FL
Like the others said - camber and toe. If you installed the shocks, lowered and reassembled without an alignment, you are way off. Especially in front. I did this.
fwiw, I was running pretty agressive camber in the past with minimal toe (about -2.3 deg in rear; stock is about -1.3 deg) and was getting about 8K out of a set of rears. I am at ROW sport height now and run basically stock camber and toe all around; get about 20K out of a set of rears. But I do quite a bit of highway miles.
I have had that problem where I can't get less camber - beyond ROW sport on the left side of my car only in the rear, I can't keep it at -1.3 deg.
dave
fwiw, I was running pretty agressive camber in the past with minimal toe (about -2.3 deg in rear; stock is about -1.3 deg) and was getting about 8K out of a set of rears. I am at ROW sport height now and run basically stock camber and toe all around; get about 20K out of a set of rears. But I do quite a bit of highway miles.
I have had that problem where I can't get less camber - beyond ROW sport on the left side of my car only in the rear, I can't keep it at -1.3 deg.
dave