Sturmey Archer Rear Hub X-RK4 4sp TSS42 Disc twist

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• 6-bolt disc mount

• 4-Speed internal gear hub with gear ratio of 210%

• Gear steps of 28%, 28% and 28%

• Rotary gear selector without protrusions outside the frame

• Direct drive in 1st gear allows use of smaller chainwheels

• 6061 Aluminium hub shell

• 36 spoke holes

• Anodized alloy finish

• Weight: 1270g