Camber issues on rear?
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Joined: Feb 2008
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From: Toronto, Ontario
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Camber issues on rear?
I have a 996tt, and I am going to put 997tt 19 inch wheels and tires on it, with 305 Bridgestones on the rear. Stock suspension. The problem - the rear tires, especially the driver's side, rub HARD against the fender liner! I have tried 7mm spacers, and to experiment, I even tried two of the spacers (total 14mm) on the driver's side (I didn't drive it that way, I just installed them and lowered the car off the jack to see if they would clear). Still rubbing slightly on the lower part of the rear inner fender. 
If I spaced it out any more, I can see clearly that the outer side top of the tire would hit the fender lip, so it seems as if there must be little or no camber built into my alignment set up. There are no handling issues with my stock 18 inch rims and 295 p-Zeros on the rears, no rubbing, and there is no evidence of accident damage (paint is original, carfax clear, nothing bent on the suspension)
Has anyone else encountered this? Is there enough adjustment built into the alignment that the previous owner could have had the camber adjusted to almost vertical?
If I spaced it out any more, I can see clearly that the outer side top of the tire would hit the fender lip, so it seems as if there must be little or no camber built into my alignment set up. There are no handling issues with my stock 18 inch rims and 295 p-Zeros on the rears, no rubbing, and there is no evidence of accident damage (paint is original, carfax clear, nothing bent on the suspension)
Has anyone else encountered this? Is there enough adjustment built into the alignment that the previous owner could have had the camber adjusted to almost vertical?
Registered User
Joined: Jan 2008
Posts: 241
From: Westminster, MD
Rep Power: 28
I have a 996tt, and I am going to put 997tt 19 inch wheels and tires on it, with 305 Bridgestones on the rear. Stock suspension. The problem - the rear tires, especially the driver's side, rub HARD against the fender liner! I have tried 7mm spacers, and to experiment, I even tried two of the spacers (total 14mm) on the driver's side (I didn't drive it that way, I just installed them and lowered the car off the jack to see if they would clear). Still rubbing slightly on the lower part of the rear inner fender.
If I spaced it out any more, I can see clearly that the outer side top of the tire would hit the fender lip, so it seems as if there must be little or no camber built into my alignment set up. There are no handling issues with my stock 18 inch rims and 295 p-Zeros on the rears, no rubbing, and there is no evidence of accident damage (paint is original, carfax clear, nothing bent on the suspension)
Has anyone else encountered this? Is there enough adjustment built into the alignment that the previous owner could have had the camber adjusted to almost vertical?
If I spaced it out any more, I can see clearly that the outer side top of the tire would hit the fender lip, so it seems as if there must be little or no camber built into my alignment set up. There are no handling issues with my stock 18 inch rims and 295 p-Zeros on the rears, no rubbing, and there is no evidence of accident damage (paint is original, carfax clear, nothing bent on the suspension)
Has anyone else encountered this? Is there enough adjustment built into the alignment that the previous owner could have had the camber adjusted to almost vertical?
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Joined: Mar 2007
Posts: 1,870
From: San Diego, San Francisco
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The offset is different for a 997tt than a 996tt but your spacers should have compensated for that. I agree with Triple, the problem is in the aspect ratio. The stock tires are 295X30x18 which yield a tire height of 24.97". The Bridgestones are 305x30x19 which have a tire height of 26.2". Your tires are about .60 taller inside the wheel well. For more than just clearance reasons (ie the all wheel drive system) you should keep your tire height within 2% of the OEM spec and within 2% front to rear. I installed PPS10 that lowered my 996tt 1.5" front and 1" rear using F235x30x19 et43 and R315x25x19 et39. I had to roll the inside fender lips of the rear to make sure they did not rub. Camber is set a -1.5. I think you'll have to go with different tires and spacers to stop the rubbing.
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