The new DT Swiss EXP freehub is lighter because it has fewer parts with just one spring and ratchet. The hub features steel bearings and a 36-tooth ratchet, but DT Swiss ceramic
CeramicSpeed Roval Wheel Kits | Bikebug
Specialized Roval Fusee Front HUB Bearing Set Quality Bicycle Ball Bearings VXB Brand: Bearings And Bushings: Amazon.com: Industrial & Scientific