Fulcrum Speed 55T Tubular Road Wheelset - CULT The Fulcrum Speed 55T Tubular Road Wheelset - CULT is the latest response to the historic challenge of headwinds and attrition. Fulcrum spent hours and hours in wind tunnels. It studied the effects of rolling on the structure of the rim to make a wheel dedicated to the very essence of speed, when average speeds are really high and every watt has to count The 3K carbon rim is 55mm high and features a wider 24 2mm external width. The braking track has a special 3Diamant™ treatment to guarantee power and excellent feel when braking in any condition. The tubular contact well in 3K carbon offers optimum resistance The CULT™ ceramic bearings ensure maximum smoothness thanks to the use of special reduced lubricant bearings. Carbon hubs with an oversized aluminium flange and Two-to-One™ technology on the rear help to transmit all the power to the ground The doube-butted steel spokes have an aero profile to enable maximum aerodynamic penetration. Aluminium nipples make it possible to reduce the peripheral mass, increasing the responsiveness of the wheels Features: Rim Material: Full carbon, 3K, carbon fibre finishing Tyre Type: Tubular Suggested Tyre Width: 25mm to 32mm Profile Height: High Rim Height: 55mm Rim Width: Outer: 24 2mm Braking System: Caliper Braking Surface: 3K carbon fibre braking surface with 3Diamant™ treatment Spoke Count: Front: 18; Rear: 21 (7 left & 14 right), Two-to-One™ Spoke Material: Stainless steel, doube-butted Spoke Type: Aero, straight pull Nipples: Aluminium Front Hub: Carbon, aluminium flanges, QR Rear Hub: Carbon, aluminium oversized flange, QR Bearings: CULT ceramic bearings, adjustable cup & cone bearing system Other: Plasma treated HG freewheel, aluminium axles Weight: 1280gBuy Fulcrum Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.