I have a 2018 f350 6.7l dually
OEM puck system for fifth wheel hitch.
The two front tires are constantly wearing on the outside of the tire after about 22,000 that isn't all tow miles. this is the second set of Michelins. The front end is lined up everything is in the green.
The total hitch weight in the bed of the truck is roughly 3,300lbs. The truck squats about 2, 2-1/2" . I am thinking on adding a leaf spring to reduce the squat. but I don't know if that's the problem. Anyone ??
Thanks
Mark

 

Two things I would suggest,
First get rid of those Michelins,they were once a very good tire, but something went wrong on the way and they are not what they used to be..

Second, if the front tires have feather edges on the tread area, the vehicle might have excessive toe in.

If an auto shop did the alignment, better to have Ford do it.

 

Did the shop provide you with 'initial and final' alignment report?l

 

They did showed everything in the green. The alignment was preformpreformed by a Ford dealer.

 

Any suggestions on a tire ?
I was thinking about adding a leaf spring, but I don't know if that's the problem.