I did finally decide on the 21" mini drum for the Triumph Chopper and it arrived today. I contacted our friend Francois over at The Rat Shop in Montreal and he sent it over quick fast. Not only that but he cut and spun up a couple of spacers and axles. This wheel is going on a DNA springer. I know you get what you pay for but this is being built on a budget. The 3/4"axle that came with the springer was too big and the wheel needs a 5/8" axle. So Francois did his thing and got them done. Check out their stuff, they make some crazy machines.