DT Swiss 180 EXP Rear Hub - 12 x 148mm Center-Lock XD Black 28H Straight Pull 36pt. Lighter stiffer more precise and easier to maintain - the strengths of the 180 hub are further enhanced with the new Ratchet EXP technology. The ultra-reliable freehub system transfers the highest pedaling loads resulting in direct power transmission. Smooth-running SINC Ceramic bearings bring the decisive advantage with their extremely low rolling resistance.