DT Swiss 240 EXP Rear Hub The DT Swiss 240 is a cult classic hub that's engineered to provide industry-leading performance and reliability. The new EXP version is available in both 36T and 54T ratchet options; the 240 offers lightning-quick 10-degree (36T) and 6. 7-degree (54T) engagement options. The Ratchet EXP system is an extremely efficient and reliable system that uses fewer moving parts than other ratchet designs. The full engagement ratchet design creates a large contact surface that overall reduces surface pressure. Easily replaceable, long-lasting stainless steel bearings keep the DT Swiss 240 hub spinning smoothly for years to come. Increased bearing distance further increases the longevity of the bearings. Features36T or 54T engagement options provide lightning-fast engagement Ratchet EXP is incredibly reliable and efficient Stainless steel bearings are long-lasting and easy to replace Multiple hub configurations for every bike and drivetrain SPECIFICATIONSHub Size12x142mm Spoke Interface J-Bend Hub Drilling24HBrake Type Centerlock Cassette Compatibility SRAM XDR | Dt Swiss | 240 Exp Rear Hub 12 X 142Mm, 24H, J-Bend, Center-Lock, Xdr