Cervelo S2 2011 Frameset

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The S2 is the pioneer of carbon fiber aero road frames and already has the reputation for being the ultimate pro bike. That’s not surprising, given its long list of victories. What about comfort? Truth be told, many frames with aero tubing lack in comfort. At Cervélo, they have been designing aero road bikes for 15 years. They have the most experience in building aero frames without losing focus on weight, stiffness, strength AND comfort. So much so that Thor Hushovd has won cobblestone races on the S2. The S2 is part of the S-series, Cervelo's all-round models equally at home in fast solos and hilly terrain. With just a few grams more than the R-series, it offers a true aero advantage. Characteristics: Reduced Aero drag to save enrgy A low geometry to put yourself in an aero position Proper road bike performance, because an aero focus shouldn't compromise lightnes, BB / Torsional stiffness and/or comfort. TECHNOLOGY Oversized Bottom Bracket Area - Big volume and fluent form aligns the carbon fibers with the complex loads in this area - This increases: Side-to-Side BB Stiffness (better power transfer) Torsional Stiffness (better handling) TrueAero Shapes - Long-tail airfoils with a 3:1 ratio or better create the lowest drag - Truncation can be useful, for example if flow interacts with another object. Smartwalll for Carbon - Carbon strength & stiffness depend on the size, shape, material & fiber direction of each of the 300+ pieces of carbon in a frame - Cervelo's Smartwall lay-ups are based on 15 years experience and the most advanced tools, including in-house developed optimization software - Smartwall also puts extra carbon on the sides (far from the center plane) to increase stiffness at little extra weight. S2 Aero Seatstays - Special TrueAero shape": Profile designed in the direction of the aeroflow (horizontal) Different shape on the inside than on the outside (to deal with the spinning wheel) Only 10mm wide for maximum compliance (within reason), minimal weight and frontal area - S-Bend for some additional vertical compliance (keeping in mind that the frame plays a minor role in vertical compliance anyway). Aero Headtube - The narrow section between the bearings reduces the frontal area and thereby the aero drag (which is linearly related to the frontal area) - Narrowing this area also improves the headtube's aspect ratio (same gusset length divided by a smaller width renders a higher ratio) to get closer to a 3:1 airfoil. Internal Cable Stops ICS3 - With ICS3, Cervelo continues to lead the industry in internal cables - No housing inside the frame gives crisper shifting and 200 grams less weight. - New stainless steel internals with replaceable Teflon liners further reduce the friction. - Integrated toptube adjuster allows on-the-fly fine-tuning. A first for internal cable systems. Specifications : Frame TrueAero Smartwall Carbon - ICS3 Fork 3T Funda Team Headset FSA Orbit IS carbon Seatpost Cervélo aero SL - One Position Front Derailleur Type Braze-On Required BB Type 68mm - English Weight (Est.) 1150 grams

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