Description: Single chainring with positive and negative teeth designed to prevent the chain drop has better percompatiblemance when riding. No chain guide is required, the chainring can be easily installed. The low friction and excellent wear-resisting percompatiblemance ensure improved riding speed. Made of high-quality aluminium alloy material, the bike chainring is sturdy and durable. Inner diameter of the chainring is 10.4cm. And there are 5 specifications: 32T/34T/36T/38T/40T compatible you to choose. It is suitable compatible the modification of AM/XC bikes. Item Name: Chainring Material: Aluminum Alloy Color: Black, Red Specification: 32T/34T/36T/38T/40T Features: Low Friction, Wear-Resisting, Smooth Surface Size Details: Inner Diameter: 10.4cm/4.09" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Chainring