Aluminum Alloy Crank Arm Fixing Bolt And Crankset Nut For MTB Bikes CNC Machined Screw Cap Cover M18 M20 Black High Strength Crank Bolt Cap For Central Axis And Sprocket Easy Install

Aluminum Alloy MTB Crank Arm Bolt and Cap M18/M20
✔️ CNC aluminum alloy crank bolt cap fits M18/M20 black high strength

Designed for mountain bikes, this CNC machined aluminum alloy crank arm bolt and cap cover secures cranks on the central axis and sprocket area, offering a clean black finish and reliable strength for daily rides.

✅ CNC machined aluminum alloy construction for high strength
✅ Fits M18 and M20 crank bolt sizes with secure central axis cap
✅ Black color matches most frames and resists corrosion
✅ Easy installation with precise threading and durable finish

💡 What is a CNC aluminum crank arm bolt cap and how does it help MTB setups?

This handy part keeps crank bolts secure and protects the central axis. - CNC aluminum alloy construction for light weight and corrosion resistance
- Fits M18/M20 bolt patterns common on mountain bikes
- Provides secure fastening and protects sprocket area from dirt
- Black finish matches most frames for a clean look and long life
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