The Ridley Fenix C10 Complete Road Bike sits at the top of Ridley's Endurance line of racing bikes. To figure out exactly what that means, we looked to the Belgian manufacturer's two other racing bike categories, Stiffness to Weight and Aero. Given that one category claims low weight and the other claims aerodynamics, we suppose that leaves brute strength for endurance. And what does that look like in practice It looks like Lotto Belisol's classics man, Roelandts, standing on the podium at Flanders after he rode the Fenix to third place in 2013. The Fenix C10 is all about staying strong all day long. Toward this end, it uses a vibration devouring blend of 30 and 24 ton unidirectional carbon fibers as opposed to the 50 to 60 ton moduli favored in only weight is important frames. Potholes, cobblestones, and other road hazards are as smooth as crosswalk paint on the Fenix, but they may feel like taking repeated hammer blows to the kidneys on 60 ton carbon. The C10's oversized bottom bracket and burly chainstays mean comfort doesn't come at the cost of efficiency, though. If you ever get tired of wantonly running over obstacles, the stiff, tapered head tube nets responsive steering to dodge through debris with ease. The C10's kit is a race worthy build centered around Shimano's under appreciated Ultegra groupset. We contend that Ultegra is World Tour level gear, and it's complemented well by the inclusion of Fulcrum's Racing 5 wheelset and Continental's Ultra Sport II tires. The saddle, seatpost, and cockpit all come from 4ZA, another Belgian manufacturer. The internal cable routing also supports the installation of an electronic groupset, but we're confident that one ride on the new Ultegra will banish any thoughts of upgrading. The Fenix C10 Ultegra Complete Road Bike is available in six sizes ranging from XX Small to X Large in the color Whiteblue.