Shimano Ultegra FC-6800 / FC-T661 Crank Arm Fixing Bolt

Features:

• Bearing Preload Adjustment: Applies light pressure to preload the bottom bracket bearings before securing the left crank arm.
• Crank Arm Security: Helps remove unwanted movement or play when correctly installed.
• Shimano Compatibility: FC-6800 uses Shimano part number Y1P417000. The FC-T661 Deore LX crankset uses a different fixing bolt, Y1KS13000. These should not be assumed interchangeable.
• Replacement Part: Suitable for replacing a compatible missing or damaged crank arm fixing bolt.
• Installation Tool: Requires a compatible crank arm cap tool, such as Shimano TL-FC16 or TL-FC18, depending on the bolt design.

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