Description: With CNC integrated craftsmanship, the bike chainring is more sturdy and safe to use, which is suitable for long-term use. The oval shape design can make the chain more consistent and reduce the chain loss. With extended edition positive and negative teeth design, the chain have a better effect and there is no need to install a chain guide and worry about losing the chain. It can help the vehicle reduce the weight of about 1kg. Made of high quality aluminum alloy material, the product is solid, strong and durable. The specifications of the product is 32T/34T/36T/38T, which is optional. It's suitable for bicycle, mountain bike, road bike, etc. Item Name: Bicycle Chainwheel Material:Aluminum Alloy Shape: Oval Color: Black, Red Craft: CNC Size: Black,32: 13cmx13cmx0.2cm/5.12inx5.12inx0.08in Black,34: 13.7cmx13.7cmx0.2cm/5.39inx5.39inx0.08in Black,36: 14.7cmx14.7cmx0.2cm/5.79inx5.79inx0.08in Black,38: 15.5cmx15.5cmx0.2cm/6.1inx6.1inx0.08in Red,32: 13cmx13cmx0.2cm/5.12inx5.12inx0.08in Red,34: 13.7cmx13.7cmx0.2cm/5.39inx5.39inx0.08in Red,36: 14.7cmx14.7cmx0.2cm/5.79inx5.79inx0.08in Red,38: 15.5cmx15.5cmx0.2cm/6.1inx6.1inx0.08in 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. There are various specifications to be optional for you. Please make sure your crank BCD is 104BCD before purchase. Package Includes: 1 X Bicycle Chainwheel