Is the new Factorbikes O2 VAM really “the world’s fastest climbing bike”? That's the claim... cycling
Factor has unveiled a new version of its O2 VAM which it calls “the world’s fastest climbing bike”, coming with a frame that weighs a claimed 730g, including its external seat post. Factor says that the updated O2 VAM can be built up into complete bikes that weigh as little as 6.2kg and that it’s possible to hit the UCI’s 6.8kg minimum weight limit for racing with the pedals, transponder and race number attached.
Graham Shrive, Factor’s Director of Engineering, says, “We began by asking the riders of the Israel-Premier Tech team ‘On what terrain do you get your results and how can we help that?’ They wanted a bike that would be under 7kg in race trim, with pedals, transponder and number. “Computational studies were carried out on aero profiles at a range of speeds and wind angles, on tube cross-sections as a predictor of mass, and on wall thickness versus section area,” says Factor. “An intricate optimisation process identified the shapes with the best balance of aero, stiffness and lightness.”
Of course, aero tube profiles tend to be deeper than standard shapes and the extra material increases weight, so the difficulty is to combine aerodynamics and lightness. The seat tube reaches across the full width of the bottom bracket but tapers significantly as it extends upwards. The idea is to combine stiffness and aero performance. The slimness up top is designed, with the flattened top tube “to enhance in-plane compliance for comfort and energy dissipation.”Factor’s in-house component brand Black Inc is also introducing a new 28//33 tubeless wheelset that is “designed to complement the new O2 VAM”.
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