The hand-built series is designed for the pursuit of high speed, high elevation, and off-road. Carbon fiber bike gravel wheels. with DT Swiss 180 Ratchet EXP 36 Ceramic Bearing hubs and aero Sapim CX-Ray spokes, The smooth-running SINC Ceramic ball bearings offer you another decisive advantage, which is lighter, stiffer, more precise and easier to maintain. Top Racing level, perfect transmission of your power and the ultimate in lightweight.