over inflation is my guess ,im by my means a tire specialist tho....We had a guy coem into the shop i work at with the prblm and he had over inflated the tires
Yup same marking here on my KDW2's as well. Guess thats just how they look, not tire wear. I've noticed it on several other cars. I run them at 33-34psi out back and 35psi in the front and they hook pretty damn good even with my newly installed 3.73's trying to destroy them on the 1-2 shift . At the track, i drop the rears to 30 and raise the fronts to about 40 so they are lighter. Haven't tried that technique with these tires yet, but hopefully i will head to the track this weekend.
I'm just wondering Killy, since you keep everything else stock, when the stock Goodyears wear out on the car, do you just replace them with the same tires as well?
I have played with mine from between 30 and 35 psi and found that the lower the psi, the smoother ride, and lower MPG. Higher psi, rougher ride, and higher MPG.
We used to use a trick with big off road tires and good old fashion chalk to determine the best PSI and maximize tread footprint. Do you think that same thing would work on high performance tires that we use?