Features: 1. There is no need to install a chain guide, and no need to worry about dropping the chain; it is suitable for XC-AM model modification single disc. 2. Made of High quality aluminium alloy, high strength.Stiff 4mm plate thickness to ensure no flexing. 3. Narrow Wide tooth design: Ensures good chain retention, increases wear life, and reduces friction and noise. 4. Suitable for most 104BCD cranksets. Please determine your crank BCD specification carefully before buying. 5. Product advantages: The design of positive and negatives gears prevents the chain from falling, which is suitable for AM/XC models to modify single discs, which can reduce weight by about 1KG Remove the front derailleur left finger dial middle plate large plate part of the line tube, etc. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. 2. Please make sure that the crank specification is BCD 104MM before purchasing. Specification: Type: Chainring circular disc/elliptical disc Material: aluminum alloy Thickness: 4MM BCD: 104MM Number of teeth: 32T 34T 36T 38T 40T 42T optional Package List: 1 x Chainring