Cervelo R5 2011 Frameset

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The R5 is one of the lightest frames in the world, but it is no lightweight. Because Cervélo does not lower its stiffness and strength standards for its lighter frames, the R5 boasts incredibly high test scores, but at an even lower weight than the R3. The R5 achieves this by using most of the technology developed at the Project California facility and showcased in the R5ca. The R5 is part of the R-series, designed to make a difference on the hills and mountains. Characteristics: Low weight to help your climbing. Torsional stiffness for safety and confidence while descending. BB stiffness to not waste any energy. Vertical compliance and vibration damping for comfort on long rides & bad roads. TECHNOLOGY BBright: - Supported by SRAM, Campagnolo, FSA, Rotor, Zipp, Shimano - Wider non-drive side for wider chainstay, seattube and downtube. More Balanced Stiffness (left vs. right) or the frame and crank Normally the right pedal feels stiffer than the left, BBright gives the left an extra boost - Big, 30mm AxleL stiffer & Lighter Squoval - Square tubes have more material far from the neutral axis which reduces side-to-side flex - Round tubes resist torsion better - Squoval has both: Lots of material far from the neutral axis Convex walls & rounded corners improve torsional stiffness & prevent denting and buckling Smartwall 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. Optimized Headtube Taper - Many standards exist for the lower headset size: 1 1/8", 1 1/4", 1 3/8", 1 1/2" - Best size depends on stiffness, strength, weight, and aero demands. - Cervelo's R&D shows that for non-aero frames. 1 3/8" is ideal Smaller leads to less stiffness for the same weight Bigger leads to less comfort and less stength in frontal impact Ultra-Thin Seatstays - Cervelo pioneered the ultra-thin seatstays on carbon frames. - They are vertically compliant and vibration absorbing (keeping in mind the frame only plays a minor role in comfort) - Due to their small cross section they are also extremely light - Strong, Light, and Comfortable, an unbeatable combination. Minimalist Front Derailleur Mount - Minimalist Design: 4.8 grams - The front derailleur mount is fully Di2 Compatible - The mount incorporates a stiffer design which improves shifting, in particular with SRAM drivetrains. Reverse Seattube Collar - Minimalist design: 8 grams - Sitting loads push the seatpost rearwards, putting high stresses on the slot and clamp bolt of standard rear-slotted seattubes. - The front slot and pinch alleviate this stress and increase longevity - Seattube is flattened in the rear to make incorrect assembly of the seattube collar impossible Single Bend Cable Routing - The straight line from downtube cable stop to chainstay cable stop for the rear derailleur is evident - Thus the cable only bends in one location and one direction for minimal friction (extra important for the newer drivetrain systems) - The front derailleur cable also has a single-bend path Specifications : Frame Squoval Carbon Tube Shapes Fork FK30 SL - tapered 1 3/8th Headset Cane Creek IS-3 Seatpost 3T DORICO LTD Crankset ROTOR 3D+ BBright (Round 53/39) Bottom Bracket SRAM Pressfit BBright Front Derailleur Braze-On Required Weight (est.) 850 grams (Frame)

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