<IMG src=smileys/smiley19.gif border="0">I have a F350 4X4 and I am having problem with the front tires wearing out in a cupping style. This truck have a factory lift and Rancho shock, The truck has 14000 miles. Does anyone offer any advice.

Rotation?

do you tow/haul alot of weight?

There is usually a reason why tires cup. Cupped tires are usually caused by shocks and struts, (sometimes other worn suspension parts) Its possible that the hub assembly and wheel bearings are causing the cupped tire and needed replaced.