2003 Impala with 45,000 miles. Just replaced front brakes, rotors and tires
from normal wear. Still was getting a vibration while stopping in the pedal
so I checked the back and sure enough they are worn out also. The question
is the back tires both on the inside have a feathering going on. These tires
have been on the car since we got it with 15,000 miles so I assume they are
the original and look perfect except the inside ring. What would cause this
any idea? They were never rotated and the car drives perfect.
Normally if the rear tires scallop/feather the rear toe is out or the
shocks/struts are weak. Rotations are important on a fwd car, but even
without that, wear only evident on the inside is indicative of other issues.
As a fellow W car owner, I also have the inside rear tire wear described in
the initial post. Initially, the wear was due to worn out rear springs. I
have since changed them and the tires. A month or so later I made a 2000 km
trip with quite the load in the car. Once I got to my destination I noticed
the rear tires were wearing on the inside again, obviously from the
increased camber caused by the heavy load.
So, on to my opinion, and that's all it is:
If those 45,000miles were put on with adults in the back and/or load in the
trunk most of the time, then it seems like normal wear. You could check the
ride height front and back at the jacking points to see if the rear end is
sagging at all (I believe the heights should be the same).
And as always, check what Shep says too.
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