Too much camber (inward or outward tilt of the wheel at the top) will produce wear on one side of the tire tread. If there is too much positive camber, the tread wear will be on the outer ribs. If there camber is negative, the wear will occur on the inner side of the tire tread. If there is excessive wear on both inner and outer areas of the tread, it probably was caused by too much skidding on turns.