DT-Swiss 240 EXP 6B-Disc 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 or 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 smooth for years to come. Increased bearing distance further increases the longevity of the bearings. Features36T or 54T engagement optionsprovide 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 Size12x148mm, 12x157Spoke Interface J-Bend Hub Drilling28Brake Type6-Bolt Cassette Compatibility Shimano 12-Speed Microspline (HG+), SRAM XD | Dt Swiss | 240 Exp 6B-Disc Rear Hub 32H, 12X157Mm, Hg+