Sanmum 1 Piece Bike Crankset Arm Bolt Aluminum Alloy Bicycle Crank Arm Screws Crank Fixing Bolt Axis Nut Cover Replacement (Black M18*11mm)

• Crank cover can distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part. The fine design with precise machining, fits crank perfectly and offers professional fixation of crank.
• Crank fixing bolt is used to fix the the crankset and crank of the chain wheel, suitable for mountain bikes and road bikes.
• Crank bolt is made of high-quality aluminum alloy, which is rust-proof, strong, firm and durable. Good processing with good texture can ensure a long service life.
• CNC machined with high precision for burr-free finish and standard threads, fits perfectly to keep water, dust and other elements out.
• Easy to install by using the British 3/8inch (10mm) allen wrench(not included). Great accessory for bicycle enthusiasts.

Description: CNC machined with high precision for burrfree finish and standard threads. Fits perfectly to keep water, dust and other elements out. Crank fixing bolt is used to fix the the crankset and crank of the chain wheels Suitable for mountain bikes and road bikes. Crank cover can distribute the pressure of the nut over the part being secured. Reducing the chance of damage to the part. Fine design with precise machining, fits crank perfectly and offers professional fixation of crank. Easy to install by using the British 3/8inch (10mm) allen wrench(not included). Specification: Material: aluminum alloy Outer diameter: about 28 mm/1.1 inches Size:M15*11mm; M18*11mm; M19*11mm; M20*11mm Package includes: 1x Bike Crankset Arm Bolt