I'm going through my new to me '86 and have finally gotten to the tires. From the pics attached it's obvious the tires in the rear have worn unevenly in what I presume is caused by severe negative camber though none of the wheels look angled in at all. The tires in front are also showing the same pattern but not so severe. I don't know if the tires were rotated to different positions since they were first installed. The car only has 21k miles on it and I doubt it's ever had an alignment. The previous owner only put 5k miles on the car in his 21 years of ownership and these tires are newer than that! My Bertone factory answer book says camber is "unadjustable" which seems odd. Before I buy new tires I want to give the new tread a fighting chance. Questions: 1) Is this wear pattern common? 2) What are the causes? 3) How do you adjust camber on an X?