Take-Off Item: This product is sold as a take-off item. It was removed from a bicycle prior to use. Original packaging may be missing or incomplete. Minor cosmetic blemishes may be present. The product is in full functioning order.

The Shimano 105 FC-R7100 is a 12-speed road crankset built around HOLLOWGLIDE hollow aluminum construction. The hollow crank arms cut weight while preserving the stiffness needed for efficient power transfer, finished with a gloss black anodized coating. This listing is for the 170mm arm length in a 50-34T chainring combination.

The chainrings incorporate resin ribs on their back face, a structural choice that reduces mass while maintaining crisp front shifting. A Q-factor of 148mm produces a narrow stance consistent with road geometry. The compact 50-34T gearing covers climbing and flat terrain without requiring a front derailleur adjustment across most road builds.

Quick Facts

Feature	Specification
Compatibility	Shimano 12-speed
Crank Arm Length	170mm
Chainring	50-34T
Q-Factor	148mm