Lighter, stiffer, more precise, and easier to maintain - the strengths of the 180 hub are further enhanced by the new Ratchet EXP technology. The highly reliable freewheel system transmits maximum pedal forces, allowing for direct power transfer. Smooth-running SINC ceramic bearings provide the crucial advantage of extremely low rolling resistance. DT Swiss 180 hub - the ultimate in lightness, stiffness, and durability.