BDop Cassettes took several years to design and to test. This included 2 years as a sponsor for an Elite cycling team in Asia that placed on the podium in races from Taiwan, Malaysia, Korea, Hong Kong and Japan.
They are meticulously machined from single blocks of high quality alloy or steel. Consideration has also been given to how they engage with alloy freehubs. The resulting design spreads the load over a wider area and stops the cassettes from damaging alloy freehub bodies.