BOLANY Mountain Bike Crank Arm Set Aluminum Alloy Black 8 to 12 Speed CNC Machining Bike Accessories

Feature: 1. Premium Aluminum Alloy: Made of premium aluminum alloy, the bike crank arm set is light in weight, compatible with 8 to 12 speed. 2. High Toughness: The bike aluminum alloy crank arm has a muscle line design, high strength and has a long service life, stable for you to step on. 3. Anodic Oxidation: The black bicycle crank arm has been anodic oxidation treated for its surface, which can protect its main body, sturdy and shock resistant. 4. CNC Machining: The 8 to 12 speed adopts CNC accuracy machining, which makes it has high toughness, suitable for some difficult operation movement, such as mountaineering and off road, with even force. 5. Reduce Noise: The CNC machining crank arm can reduce friction and noise, you can use it to replace the old or damaged parts so that to prolong the service life of your bike. Specification: Item Type: Bike Crank Arm Material: Aluminum Alloy Weight: Approx. 803g 28.33oz Color: Black Compatible Speed: 8, 9, 10, 11, 12 Speed. Package List: 2 x Bike Crank Arm2 x Installation Tool4 x Installation Nail