I’m a redneck, take this with a grain of salt and a ton of caution. I also call studs nuts and perches collars. Installed RPG Perch collar 3” front and 2.25” rear to run 37x12.50x17 BFG KM3’s. I ran the stock tires on this lift for several days before tire install, ride quality was barely affected. New tires affected ride quality more than this lift. Very happy, would do again.