Rear tire wear!?!?

[Bobiam]

I wore down a pair of 265/35-18 Continential ContiSportContact 3 tires in less than 12K. Never spun tires or raced. Pretty gentle use actually.......less agressive than the tires are made for.

Tread wear rating is 280. TireRack calls these "excellent" treadwear. I don't agree! But I just ordered a replacement pair of same for $639, delivered. The fronts are practicly new so I really can't switch brands this time around.

The tires are evenly worn and the car doesn't indicate suspension problems when driving it. Can't complain about the performance of these tires. Great grip in all warm conditions. Only con is significant flat spots after some storage.

Does this sound like normal wear to you guys???

Thanks, Bob