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Information from: www.shimano.com.

Shimano Alfine Comfort Cranks. ALFINE 2-Piece Crankset

Technical Documents




Chainring sizes: 39T, 45T

9-speed compatible chainrings

Use with CN-HG53 super narrow chain

2-Piece crankset with integrated bottom bracket

Chainguard integrated design

Iconic Shimano cap-free design


BB Shell Width: 68mm

Bottom Bracket: SM-FC4500

Chain Line: 42.7mm (single) / 49.2 (double)

E-type FD Compatible: yes

Bottom Bracket: included

Chaincase Compatible: no

Chain Guard: single / double

Chainring Bolts & Nuts: stainless steel (bolt), steel (nut)

Inner Chainring: -

Middle Chainring: -

Outer Chainring: aluminum

Crank Arms: aluminum

Crank Arm Length: 170mm

Bolt Circle Diameter: 130mm

Chainring Sizes: 39T / 45T

Chain Compatibility: Super Narrow HG for 9-speed

Crank Construction: 2-Piece

Series: ALFINE

Model Number: FC-S500