I’ve encountered a curious tire wear issue that warrants some feedback thoughts from the collective. I recently replaced all 4 tires on the wife’s Saab because of the tire issue shown in pictures below. The inner edge of the tires wore clear through to the cords on 2 of 4 tires and the other 2 were close Pictures show one cored, the tread used and the 3rd worn but not corded. In 27,000 miles, long before hitting the wear bars. These are Khumo Ecsta LX Platinumtires and the second set of tires to do this.
The last set of Khumo Ecsta ASX tires went 35,000 miles but failed before the wear bars appeared. I used the same model ASX tires on the Mustang and had no issues like this. I drove the heck out of them, put 25,000 miles on and sold them with tread left.
The first set of OEM Michelins did not wear like this but got extremely noisy as they reached time for rotation. Rotate in a X pattern and they were quiet for a while but they wore evenly.
The car is in alignment except the rear has 1/4 degree more negative camber than Saab specs out, but it has been at the max limit when new and its sagged a bit over the years. Rear toe is a touch more than I prefer at 0.44 degrees toe in but in spec at 0.42 +/-0.2. The front is spot on at 0.20 degrees toe in and 0.75-1.0 negative camber on a spec of 0.28 +/- 0.08 toe in and -0.9 +/-0.5 camber. I ran much more aggressive camber on the front of the Mustang, -1.5 for the street and -2.25 for the track with way more caster than the Saab.
Is it the tires? Is it the car? Anybody else have similar experiences with these tires or manufacturer?