Re: How TO: Check kingpin wear/cause of uneven tire tread wear
I'm sure there is a correct way to check the kingpins but an alignment should give you a good indication. When they are bad you can usually see it when you look straight on the front of the vehicle. The top of the tires will lean inwards pretty bad. Your wear seems to be on the outside which could be ball joints, bad alignment, bad tires (when they start a wear pattern they will continue to wear in that same pattern no matter what you do) or possibly the kingpins although I think bad KPs would usually wear on the inside of the tire.