Annoying problem, what do you think?
 

i put on 35x12.5x17 tires on my truck with a 6" lift. tires are pretty much new, maybe 1k on them. had the truck aligned after putting on the tires, but recently at 55mph the truck begins to ride bumpy and then smooths out around 58-60mph. at no other speeds does the truck do this, not even when pushing 90mph. anyone have this problem and if so, what did you do to correct it?

thanks in advance!

could be a broken belt in one of the tires..??

huh...how could i check for this?

probably just has to do with the valving in the shocks. running a spacer up front or longer shock?

Stock or aftermarket rims???

mine does the same thing...probably just that level i got

procomp rims and tires. i have a 3" leveling kit along with a 3" body lift.