I have a 2005 AWD with 33K on P6's. I may get them to 38K but doubt it.
I rotated the tires once at 27K. The fronts were wearing on the inside, the rears on the outside. The wear patterns cancel and I have been running air pressure 10% higher to get more wear in center.
Factory Spec is 10 degree TOE OUT for front. The rear spec is 10 degrees TOE IN.
There is a TSB on front tire wear on inside edge. The TSB says to crank the TOE to 10 degrees IN if this inner edge wear. I think it was for 15K miles warranty coverage only.
Discussion - I have not seen Front toe OUT before. Excessive toe out results in inner edge wear. So I don't know if my toe out was excessive or it should be set to zero or toe in of 10 per TSB. I'll need to measure it and decide what to do. Toe out increase over-steer while toe in increases under-steer but the steering is great, luv it.
I'm not sure what to do about rear toe-in either until I can measure it.
Then again I may do nothing since cost of alignment (and possible screw-up) must be weight against tread wear cost on new tires. I'm considering developing a procedure using laser levels but that's me and I have experience making tweeks to alignment. Also working with an independent shop technician may be the best if not costly.
Right now I'm looking at replacements; General Grabber UHP upsized to 255/55-18 from Americas Tire for under $600 after discounts. These are a summer tire but Mud+Snow rated, Z rated (168mph), load rated to 109 (2271 lbs each). I have AWD and these are good in rain and light snow per Tire Rack customers.
Last edited by glenncof; 09-20-2007 at 02:38 PM.
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