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Bicycle

Dimond Marquise Triathlon Bike: Beam-Frame Aero Review

Quick Answer: The Dimond Marquise is a beam-design triathlon bike handmade in the U.S.A. It uses a wishbone (beam) frame instead of a traditional seat tube to reduce aerodynamic drag across straight-on and yaw wind angles. The Marquise is the stiffer, higher-power-transfer evolution of…

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