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Shimano 105 FC-RS520 Crankset - 170mm, 12-Speed, 50/34t, 110 Asymmetric BCD, Hollowtech II Spindle Interface, Black

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The Shimano 105 FC-RS520 is a 2-piece, 4-arm crank that's compatible with modern disc brake road frames.
4-arm crankset for 12-speed drivetrain
Compatible with frames of O.L.D. 135mm and 410mm chainstay length
44.5mm chainline
150mm Q-factor
Compatible with HG 12-speed chains