Features： 1、PREMIUM CRAFTSMANSHIP, COMPATIBLE: This crankset is expertly manufactured to be both lightweight and resilient, making it compatible with 9 to 12 speed cycles. 2、HOLLOW INTEGRATED DESIGN: Featuring a unique hollow integrated design, this crankset minimizes weight while maximizing power transfer. This innovative construction enhances your overall cycling experience. 3、ROBUST ALUMINUM ALLOY MATERIAL: Crafted from premium aluminum alloy, the crankshaft is strong and not easy to get rusty. This makes it ideal for long term use under various conditions. 4、ROAD CYCLE: Designed for versatility, this crankset is suitable for most road cycle models. Its easy to swap structure allows you to upgrade your equipment without any hassle. 5、ACCURATE ENGINEERING: With accurately machined components, this crankset runs smoothly to provide stable and dependable power output. Enjoy a good cycling experience that meets all your performance demands effortlessly. Specification： Item Type: Cycle Crankset Material: Aluminum Alloy Chainring: 50T to 34T Specification: BCD 110mm / 4.33in Axle Diameter: 24mm / 0.94in Axle Length: 135mm / 5.31in Compatibility: 9-12 Speed Bottom Bracket: BB Bottom Bracket (68-73mm / 2.68-2.87in) Package List： 1 x Chainring 1 x Crank 1 x Bottom Bracket 2 x Accessory