What are they rubbing on? Do you have standard wheels and tires or something custom? If you have a solid 4wd front axle you should have leaf springs, and the suspension is designed to let the tires go up and down without hitting anything. Sagging ride height won't affect that. 2wd trucks had coil springs and upper and lower control arms. A worn ball joint could let the wheel tip in on top. Still, lower ride height alone will not cause rubbing. There has to be some other cause related to that.
Please consider a to help us answer more questions.
Friday, November 16th, 2012 AT 4:42 AM