tire wear problem

[F350oldskool]

Hey guys, I just got a set of 305 50r 20 wheels and tires. They have been on my pickup for like three days and they have already started cupping very badly. Any ideas? Pickup has 140000. Ball joints, shocks?

[RedneckYankee]

If ball joints and shocks are original they are shot. Did my ball joints when I got my truck with 130k on it and they were about to come apart. Just did shocks at 140k three were leaking and all of them were collapsed. Truck rides better then new now

[F350oldskool]

That's what I was thinking. It want noticeable on the stick size wheels. I just figured with these N2 really wide tires it just made it worse. The ball joints a pain to change?

[RedneckYankee]

Don't know about 4x4 but my RWD wasn't that bad once I figured out I had to strip down the spindles. From what I've read and heard they can be a real PITA. When I did mine I released a lot of built up anger swinging the 3lb sledge to get stuff apart. Good luck hopefully 4x4 owner will chime in.

[F350none]

Ball joints are not to bad on a 4x4. I did mine in about 4 hours. You will need a press. I put in new seals and the big one on the end of the axle shaft is a pain to change. Next time if it is not bad I will not change it. There is a ring on it that needs to come out for it to realease from the spindal. It is pressed on the axle shaft.

[F350oldskool]

Just a question the ball joints look relatively straight and not worn out. Could it be a possible alignment issue with toe? Or possibly air pressure?

[Zaairman]

Did you actually jack up the truck and check it or are you just looking at them?

[RedneckYankee]

You need to jack up truck and then unload wheel with a pry bar and push in and out on tire to check for movement