We use a CNC machine to cut the 11:10 Cassette from a single block of steel then press in a carbon carrier. This makes the cassette light, durable and because we manufacture it with precise tolerances, it shifts smoothly every time. What really makes this cassette unique is that it is an eleven-speed cassette that can fit on 9-11 speed cassette bodies. That means you can run your new 11-speed drivetrain without needing to replace your wheelset or cassette body. It will also fit 11 speed cassette bodies with the use of a shim.