Incredible aero performance in a more affordable package based on DT Swiss` first aero optimized alloy rimHidden nipples and DT Aero Comp II straightpull spokes further enhance the aerodynamic advantage 370 series hub upgraded with current Ratchet LN technology and it`s signature soundRatchet LN`s simultaneous engagement of each tooth offers dependable reliability in hard accelerations700CRR20Thru 12mmBlackA 1800370142Black8-11s CassCLDT Aero Comp II SP24HDblPVUPC/EAN/GTIN: 7613052317939