Rolf Prima Elan ES Disc Clincher Rear Road WheelRolf Prima's Elan ES Disc Clincher Rear Road Wheel is an alloy training wheel that will help you train with comfort and reliability without a weight penalty. Throw in the supreme stopping power of a disc brake and you'll be surprised by the impressive performance of this Elan ES Disc wheel Elan ES Disc Clincher: Light and Versatile Alloy Training WheelThe Elan ES Clincher front wheel is modestly light for an alloy training wheel at 895 grams. Aerodynamic and durable, this aero rear wheel features Rolf Prima's Paired Spoke Technology for an engineering edge alongside their Delta Rim Technology™, to slice through the wind The Elan ES rear wheel incorporates Rolf Prima's XR hubset, which is not only lightweight and smooth, but comes with their bespoke Differential Flange Diameter™ for increased durability. The CNC machined titanium freehub delivers bombproof performance through the incorporation of 3 independently sprung steel pawls at the heart of the freehub's engine room. 24 round race spokes increase the strength and durability of this rear alloy wheel, but you'll still enjoy the benefit of speed as this Elan ES wheel responds to bursts of acceleration and cuts through the wind with ease Features:Material: Alloy (Rim); CNC Machined Titanium (Freehub)AerodynamicDurableLightweightResponsiveTubeless compatible rimIncludes rim strips and QR setWeight: 895gTechnical Specification:Brake Type: DiscFreehub: Shimano/SRAM 10/11-speedHubset: XSTSpoke Count: 24Spoke Type: Round raceRim Depth: 22mmRim Width: 22mm (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 Delta Rim Technology™: In skydiving, the Delta track is the fastest position for gaining forward airspeed. So, Rolf Prima mirrored this observation and adapted it for their Delta profile, which 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 Buy Rolf Prima Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.