Rolf Prima Ares3 Disc Rear Road WheelPrepare to attack the peloton with this Ares3 Disc Rear Road Wheel. Climb, descend, and attack sweeping bends with ease and unleash your aero edge. Embrace top speed and rely on prowess of disc brakes Carbon ClimberThis rear wheel has been made to climb. So it's no surprise to see the scales read an impressive 680g for this Ares3 Disc Front Road Wheel. When coupled with Rolf Prima's Paired Spoke Technology for an engineering edge, this front wheel neutralises pulling forces for a lighter and smoother roll. The net effect: a performance-enhancing boost in aerodynamics.A TdF5.5 Hubset and Zero ceramic bearings combine for a smooth ride with further weight savings. Twenty Bladed CX-Ray spokes add the finishing touch to this minimalist front wheel to offer you the complete carbon-climbing package. Features:Material: Carbon (rim); CNC Machined Titanium (freehub)AerodynamicStrongLightweightResponsiveSuperb braking abilityIncludes rim strips, valve extenders, and QR set when applicableWeight: 800gTechnical Specification:Freehub: Shimano/SRAM or Campagnolo 10/11-speedHubset: XST+ with Zero Ceramic BearingsSpoke Count: 20Spoke Type: Bladed CX-RayRim Depth: 35mm Carbon ClincherRim Width: 25 5mm (maximum)Wheel Size: 700cKey TechnologyPaired Spoke Technology: Rolf Prima's Paired Spoke technology broke new ground when it was introduced in 1997. Bringing the spokes to the rim in pairs neutralises the left and right outward pulling forces which allows them to build true wheels on lighter rims with fewer spokes. Fewer spokes and lighter rims help create increased aerodynamics and faster performing wheels Differential Flange Diameter™: Rolf Prima's patented oversize non-drive Differential Flange provides the leverage to transmit drive torque in the rear wheel to the non-drive spokes, thereby increasing the number of torque absorbing spokes. Buy Rolf Prima Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.