170mm Bike Crank Arm Set Bottom Bracket 9‑12 Speed 32T Chainring for Road Mountain Bike

Feature: 1. Ultra Light Material: The crank is made of high strength aluminum alloy, which is durable and wear resistant under stress and will not break when stepped on. 2. Ergonomic Structure: These bike accessories have stable structure, good compression resistance, and are sturdy and durable. Perfect for people who want more control on their bikes. 3. Accurate Processing: CNC machining is adopted to ensure the ultimate retention of the chain, prolong the working life, and reduce friction and noise. 4. Lightweight While Strength: The left and right cranks are hollowed out in a large area, greatly reducing the weight while maintaining the strength. 5. Wide Compatibility: Our bike crank arm set is compatible with single disc, double disc, three disc, and it fits for most mountain bikes and road bikes on the market. Specification: Item Type: Crank Arm Set Material: Aluminum alloy Weight: Approx. 950g 33.51oz Crank Arm Length: 170mm 6.69in Compatible: 9 12 speed Style: 32T. Package List: 2 x Crank Assembly Parts1 x Chainring1 x Bottom Bracket2 x Tool4 x Steel Nail Assembly4 x Steel Nail Accessory