Bicycle Crank Arm Fixing Bolt Crankset Nut Aluminum Alloy MTB Bike Crank Cover Screw Cap M18 M20 Bolt For Shimano Crank Bolt Cap

Material : aluminium alloy Category : Crank Use : Mountain Bikes,Road Bicycles Type1 : Bike Crank Cover Screws Type2 : Bike Bottom Bracket Screw Type3 : Bicycle Accessories Type4 : Bicycle Crank Cover The main function of the bicycle crank cover nut is to fix the crank and prevent it from loosening or falling off during riding. It is connected to the crankshaft through threads, ensuring that the crankshaft does not shift during rotation, thereby ensuring safe and comfortable riding. In addition, some designs also consider dust-proof and waterproof functions to extend the service life of components