The goal when developing this product was simple, create a high quality rear sprocket that would outlast all others while keeping weight to a minimum. The TwinRing sprocket combines a specially enhanced 7075 T6 aluminum alloy center and a high strength electroless nickel coated EN8 steel outer ring.
Is the finest sprocket on the market. Fit exactly and have very good aparience. Is light and strong at the same time. I recommend use the kit (chain & sprockets) of the same maker to reduce the wear. I installed to run all Baja from the border to Los Cabos.