Wheels are made with one of the two strongest materials from Dupont
Better bearings so they are much smoother and quieter than originals
Wheel shape is designed to be stronger and last longer than originals
These will fit on all Total Gym models if you use M6 bolts and modify/change/add washers and other hardware(s) accordingly
STRONGER, BETTER, and LAST LONGER than originals and any other aftermarket products!!!