Shimano Crank Arm Fixing Bolt (also known as a preload cap) used for Hollowtech II cranksets. It is a critical component for setting the initial bearing preload on the left crank arm before it is tightened with pinch bolts.
Head Diameter: 25.1 mm.
Thread Diameter: 22.6 mm (M20 standard).
Thread Length: ~15 mm.
Overall Length: 18.1 mm.
Thread Style: Clockwise (Standard right-hand thread).
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SHIMANO Crank Arm Fixing Screw Fc-6800
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