The Shimano FC-7900 crank arm fixing bolt is a genuine replacement part specifically designed for the Dura-Ace 7900 series. This critical component ensures the non-drive side crank arm is securely tensioned onto the hollowtech spindle. It provides the necessary preload to the bottom bracket bearings before the pinch bolts are tightened for final security.

Precision-threaded to meet Shimano's highest performance standards, this fixing bolt is essential for maintaining the integrity of your drivetrain. It features the standard 8-point internal spline, requiring the Shimano TL-FC16 or a similar tool for installation. Replacing a stripped or missing bolt restores your high-end crankset to safe, factory-specification operation.

Quick Facts

Feature	Specification
Compatibility	Dura-Ace FC-7900 Cranksets
Function	Bearing Preload / Arm Retention
Series	Dura-Ace 7900
Installation Tool	Shimano TL-FC16 (Splined Tool)
Material	Lightweight Composite/Resin
Color	Black