Grand Trunk

I have a set of SZ50s with about 16K on them. There is plenty of tread left on them save for the outer edge of the front tires. I have noted this problem on several other C4s as well. Does this treadwear pattern result from factory specs or is there some other reason for it? I don't drive my car particularly hard, so I don't think it has anything to do with my driving habits.

bac22

Normal, because you can't rotate the tires on cars with different sizes.

89 Bob L

The tread wear can come from many different possibilities. As indicated before, tire rotation is a factor and one of many possibilities.

Factory Alignment Specifications can be altered to adjust to driving conditions; such as concrete roads vs tar roads, how much curve is built into the roads, highway vs. local driving, etc. A good alignment mechanic will align the car and make necessary adjustments to the factory specs.