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The Fsa K-Force Light Evo crankset pushes the technology of materials to the limit to create a super-resistant ultralight carbon crank. This specific 2x version means that you do not lose weight on unused media that could potentially fill with dirt. The use of an ABS system – Asymmetric Bolt Spacing – adds extra force to the crank arm, just where it is needed for optimal power transfer. The crowns are CNC machined from aeronautical 7075 aluminum and are mounted on ramps and locked for net shifting performance. Torx head bolts made of aluminum are a nice final weight conscious touch. The result of the whole design is a very rigid and light crank that tilts the scale to just 495 g.