Features: Craft from high stength aluminum alloy, this crankset offers a great strength to weight ratio, ensuring durability and superior transmission efficiency for varied terrain. Experience wonderful cycling performances with our bicycles crank arm set, designs to significantly reduce weight and enhances agilities and speed on road. Perfect for professional cyclists seek high performances accessories, amateur cycling enthusiasts upgrading their gear, and DIY bike modifiers look for quality part. Great for cycling, mountain traversing, competitive race, and long distances tourings, providing reliable performances and reducing fatigue for enhancs comfort. Features a practical designs, this crankset support both single and double chainring systems, equipped with a standard square interfaces suitable for various bikes. Specifications: Materials: Aluminum Alloy Color Optional: 4 Color is Available as Shown in the Picture. Package Weight: approx.499g Size: approx.170mm/6.69in (More Size Detail, Please See Picture.) Note: Please allow 1-3mm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks! Package includes: 1 Set of Bike Crank Arm Set