Feature: 1. High-strength aluminum alloy construction for enhanced durability and rigidity. 2. 170mm crank arm length and single chainring with 32/34/36/38T options. 3. Compatible with 8/9/10/11/12 speed systems. 4. Fits most bike models, interchangeable with mainstream hollow integrated chainrings. 5. Lightweight design with anti-drop chain feature for smooth and secure cycle. Specification: This mountain bike crankset is made of high-strength aluminum alloy, ensuring durability and rigidity. It features a 170mm crank arm length and a single chainring with 32/34/36/38T options. The crankset is compatible with 8/9/10/11/12 speed systems and fits most bike models. Features:High-strength aluminum alloy construction for enhanced durability and rigidity.170mm crank arm length and single chainring with 32/34/36/38T options.Compatible with 8/9/10/11/12 speed systems.Fits most bike models, interchangeable with mainstream hollow integrated chainrings.Lightweight design with anti-drop chain feature for smooth and secure cycle.Specifications: Material: Aluminum Alloy Speed: 8/9/10/11/12 Speed Bottom Bracket: BB68/73mm Crankset and Hollow Axle Length: 118mm/4.6in Axle Diameter: 24mm/0.9in Weight: 32T+Crank+BB about 841g/29.7oz 34T+Crank+BB about 850g/29.7oz 36T+Crank+BB about 860g/30oz 38T+Crank+BB about 870g/30.7oz Note:Package List: 1 x Crankset 1 x Bottom Bracket 1 x Positive and Negative Tooth Round Plate Package List: 1 x Crankset 1 x Bottom Bracket 1 x Positive and Negative Tooth Round Plate