I have an '87 GN. Originally had stock '87 GN rims with BFG Comp TAs on the front. Ride was smooth. Then replace bad ball joints, car road even better. Decided to go with 15x5 Weld draglites with MT Sportsmans(8ply) in the front for less weight. I gave them to a friend to mount because he did it for $5. Ever since I put this new combo on, when the car has sat for the night and I go to drive it the next day, the front drivers side tire/wheel bounces and jerks the car up and down on the drivers side front. After driving it for 5 minutes it is fine then, like the tire just needed to get warmed up. I first thought the balance was off on the wheel so I switched the two fronts. Still bad. Then I noticed that when I was deciding if I wanted to remove my front sway bar that I left the drivers side bolt loose. Took off the bar and still bad. I've heard that these tires are cheaply made and some other people I know have had similair problems. I'm just wondering is it the tire, because I switched them and still have the problem, or maybe the ball joint or some other suspention part is loose.