DT Swiss Steel Rear Axle For The 370/Onyx We all know that stuff happens. If you need a new axle for your rear hub, then you're in the right place. The DT Swiss Steel Rear Axle is designed for the 370 and Onyx hubs with a 135mm quick-release. It is made out of steel. Features DT Swiss part number: HCCXXX00S4079SMaterial: steel Designed for the DT Swiss 370 and Onyx 2-pawl hubs | Dt Swiss Steel Rear Axle For 370/onyx, 135Mm