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The Shimano ALFINE is a top component group for sporty and elegant cycling. Premium quality, style, adaptability and easy operation are the characteristics of the Shimano Alfine. The tidy appearance and the large gear ratio of the eight-speed hub system give this bike a real tailwind. The Shimano Alfine FC-S501 comes with SM-BB4600 bottom bracket.
2-Piece Design Integration of crank arm and bottom bracket: Increased rigidity with less weight. The axle bearings are further apart: The rigidity increases and the rider's power is effectively transmitted. Precision bearings: low maintenance and simplified assembly.
Crank arms anodised and lacquered, chainring anodised
chain protection ring (outside) made of anodised aluminium