Everyone talks about camber when they see uneven tire wear. Yes excessive camber will cause uneven tire wear, but toe is much more critical and will cause rapid uneven tire wear if not correct, because your tires are actually dragging sideways instead of rolling straight ahead. When you lower your car, you get toe out. It's a must to get your alignment done after lowering, especially anything more than a 1 1/4" drop. Toe in will cause outside tire wear, and toe out will cause inside tire wear. The tires may also show signs of feathering. If you don't get an alignment, and your tire wear is ok, your lucky.