Front Tire wear front edge couping. on new tires after alignment! Could it be kingpin

It could be. It could not. A very thorough front end inspection needs to be performed, as well as rear end suspension components. I have found in my years of working on trucks, tire wear issues and pulling issues can be very different causes but similar symptoms sometimes. King pins are easy to check, just need a long bar and a jack.

 

If you did alignment then your tie rods should be ok. Hopefully, you or the tech that did the alignment checked those. Kingpins could be an issue, pry on them a lil and check for play. If the tire is wavy on the outer edge, my money is on your shocks. It's a cheap fix that's easy to change.

 

If you have high mileage, check the frre play in steer hub bearing assembly also;I replaced mine both street hubs at 1 mil miles after getting a strange vibration all the way to steering wheel.

 

What air pressure do run in your steers?

 

If you have a pull after an alignment, then I'd suspect that the alignment was nfg. If you have steering components that were bad, an alignment shouldn't have been performed before repairs were done - the shop should have called you for authorization to remedy the problem first. You can check king pins as others have described. Tie rod ends too. Wheel bearings too. After that check for damage like a bent rod joining the steering knuckles. If all checks out, get another alignment done.

 

Agree with all that.
Who did the alignment, a good tire shop? did they use the laser alignment tools? I know some shops still don't want to upgrade.

 

If you got some help, check the alignment yourself and the kingpins and the complete front end.
First have someone work the wheel back and forth while you find any play on any steering componets.
If none, jack the front wheels off the ground, the check for any play in the wheels up and down with a bar for kingpins and wheel bearings.

To check the alignment measure the distance inside the wheels from wheel to wheel accuretly. Should be 1/4 closer in the front. I've used couple pvc pipes with one inside of the other, lock them together, pull out and measure.
I've had a respectable shop get the alignment off by and inch and not acknoledge it.
Personally I don't beleive a laser alignment is any better, it's how good the mechanic looks over the job.
Also know of big LTL carrier shops that use the stick and tape measure to set alignment with great accuracy.