when i first did the upgrade i was runnning 3rd gen wheels so i had no clearence issues not i have H2 wheeels and they firt fine with them i think the next set of wheels will be 19. 5 and i know they will fit fine with them too, they wont fit with 16" wheels and I think they made a huge inprovement my truck stops better with the 3rd gen brakes and 35" tires than it did with the stock brakes and tires
Ken
Ken