Features: Consist of aluminum alloys, extremely high strengths and light weight characteristics, ensuring durability and stability in mountain cycling. Convenient for maintenances and replacement, users can choose different lengths or types of cranks according to their needs, enhancing personality experiences. It can effectively improve the efficiency of pedals rotation, enhances cycling comfort and response speed. Provide a better pedaling experiences and reduce fatigue caused by prolonged cycling. Provide cranks of different lengths and styles to meet the needs of different height and cycling styles, with strong adaptability. Specifications: Color:Two Elections Dimension:16.5cm/6.49in Component:Aluminum Alloys Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Package includes: 1Set Mountain Bike Crankset