Rolf Prima Ares4 Carbon Clincher Road WheelsetClimb like Froome, Quintana, or Contador with this climbing-specific Ares4 Carbon Clincher Road Wheelset. Featuring exceptional aerodynamic performance, optimal weight savings, and industry leading technology, this high-end wheelset is ready to help you achieve the results you've been training for Complete Carbon ClincherRolf Prima set out to produce a phenomenal wheelset that climbs like a dream with cutting-edge aerodynamics. Contributing to this mission is Rolf Prima's Paired Spoke Technology, which delivers an engineering edge: the pulling forces neutralised to produce a lighter wheel. A TdF 5.5 hubset with ABI Zero ceramic bearings delivers more power towards forward motion with more torque absorbed through the CX Speed spokes This Ares4 Carbon Clincher Road Wheelset contains Delta Rim Technology™ for clinical performance. The Delta profile features a larger rim width and sidewall thus boosting overall wheel stability and airflow in both crosswinds and headwinds. A larger rim gives more tyre support, which in turn improves the quality of cornering and overall handling. So, you can not only dance up the climbs and take advantage of this race-ready wheelset but you also benefit on the descent. This is the complete carbon clincher climbing package from Rolf Prima. Features:Material: Carbon (rim); CNC Machined Titanium (freehub)AerodynamicLightweightImproved handling in all conditionsMid-profile wheelsetStrongIncludes carbon- specific brake pads, rim strips, valve extenders, and QR setWeight: 1365g (590g/775g)Technical Specification:Hubset: TdF5.5 with ABI Zero ceramic bearingsFreehub: Shimano/SRAM or Campagnolo 10/11-speedSpoke Count: 16/16Spoke Type: Bladed CX-Ray/CX SpeedRim Depth: 42mm Carbon ClincherRim Width: 27mm (maximum)Wheel Size: 700cKey TechnologyDeltra Rim Technology™: In skydiving, the Delta track is the fastest position for gaining forward airspeed. Rolf Prima's Delta profile takes that cue using increased width and sidewall shaping to improve airflow and stability in straight on and crosswind situations. This wider rim is not just faster, but the additional tyre support improves cornering and handling in all riding conditions 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 Paired 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. Buy Rolf Prima Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.