Way Strange Tire Wear?

[bfrazier]

BT5291, not towing anything. All tires in good shape but front left is terribly worn on inside at 6 O'clock but not at 9, 12, or 3. It is more inside than outside but really this is about it being on one side of the tire and not the other. 7/32 on all tires but to the belts in this one place. Always has a shimmy in the steering, seems likely part of same issue. I've had it 18 months, same tires, the wear has evidently gone unnoticed. Bad tire? (I get that an alignment wears the inside or outside depending on camber but not just in one area does it??)

My "expert" (Bob Winfield) couln't tell me but maybe one of you can?

Thanks,
Bob F