Shimano Crank Arm Fixing Bolt
Precision Pre-Load. Factory Fit.
The Shimano Crank Arm Fixing Bolt is a genuine replacement part engineered to meet the exact specifications of Shimano’s high-performance road and mountain bike drivetrains. Made from high-strength, lightweight reinforced plastic (or aluminum in premium series), it features a specialized spline interface designed to prevent over-torquing while providing a clean, flush finish on the non-drive side crank arm.
Why the Genuine Shimano Bolt is Essential:
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Perfect Bearing Pre-Load: Specifically designed to apply the exact amount of side-pressure required to seat Hollowtech II bearings perfectly, preventing premature wear and creaking.
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Lightweight & Durable: Engineered to be strong enough to hold your crank in place during installation while remaining light enough for weight-conscious builds.
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Tool-Specific Interface: Designed to be used with the Park Tool BBT-10.2 or Shimano TL-FC16 tool, ensuring you can reach the recommended 0.7–1.5 N·m torque without damaging the bolt.
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Corrosion Resistant: Built to withstand exposure to the elements, road salt, and frequent bike washes without seizing or degrading.
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Universal Hollowtech II Fit: Compatible with a massive range of cranksets, including Dura-Ace, Ultegra, 105, Tiagra, XTR, XT, and SLX.
Technical Specifications:
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Material: High-Strength Reinforced Polymer (Standard) / Aluminum (Series Specific)
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Interface: 8-Spline Shimano Standard
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Compatibility: All Shimano Hollowtech II Cranksets
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Torque Spec: 0.7–1.5 N·m
The Alegro Perspective: In the shop, we see a lot of these bolts that have been mangled by riders trying to use a screwdriver or pliers instead of the proper tool. It’s a cheap part, but it’s critical for the health of your bottom bracket. We always recommend keeping a spare in your toolbox. If this bolt is missing or loose, your crank arm can develop play that eventually ruins the splines on your expensive crankset.
Smooth Rotation. Secure Installation. Maintain your Drivetrain with Shimano.