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Tight tolerances and precise torque specs mean precision parts like this MegaExo 12 Left Arm Crank Bolt need to be replaced from time to time. Make sure the heart of your drivetrain is secure, and pick up a spare or two today.

- Sold per unit - Black seal

Keep that front end tight and responsive, while preserving the integrity of the carbon steerer on your high-end fork with FSA's Headset Compression Plug. - Alloy top cap - For carbon steer tubes

This is an FSA Self-Extracting Left Crank Arm Bolt for Mega Exo ATB Cranks - 30mm long - 14g - Designed to fit FSA ATB cranks only - Includes M18 bolt, M27 self-extracting cap and washers

ISIS cranks have been around a long time, and they're still a great design. If you've got one, keep it in top working condition with these quality crank bolts from FSA. - ISIS-compatible - M12