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Hey guys I have a 2010 GS with 22k miles and I just had the tires replace and an alignment performed. All of the measurements are in the green but the car seems to slighly pull to the left. Ive attached the alignment measurements below. Could you please tell me if I need to have them make any adjustments. The car is a daily driver and tire wear is my main concern rather than performance. Thanks in advance!
Last edited by Crystalred918; Feb 7, 2021 at 12:10 AM.
Here you go, and since the GS is factory built for autocross, the factory alignment on it, is going to wear out the inside of the tires faster than the outside of the tires when the car is street driven. Its when the car is pushed hard in the corner, to wear the the outside of the thread at the same rate as the inside of the tread, that the factory alignement specs work isntead.
So scroll down to the Pfad street alignment specs and you want to use the street specs for DD driving the car. This will have both the inside and outside of the treads wearing at the same rate for the DD only driving you are using the car for.
As for the alignment numbers you show, not a single number matches from side to side in the first place, so the tech is not spending enough time dialing in the alignment. Hence it's a vet, and every part of the alignment can be corrected to bring them into spec (its the reason that GM uses washers between the upper A arms and their mounting point)..
Also, the car does have steering wheel sensor in it that works with active handling, so as the car is being aligned, want to make sure that the steering wheel sensor is reading Zero as well.
IMHO - you have too much neg camber for optimum tire wear.
Try to go to about 0.5 degree (half a degree) of neg camber camber per side Max. It will help tire wear - it will hurt ultimate cornering - but that's not what you were looking for.
Use the attached file to print and take to your alignment shop. I use the Pure Street on my '11 GS, but it's never tracked. Car runs straight and true on the highway, and very little tramlining. Good tire wear so far. Insist that the alignment shop gets it exact. Close enough isn't good enough. Simply being in the green allows for way too much variation.
2010 GS alignment specs
