and high quality Features: Made of high quality 7075 aluminum, lightweight, durable and precise. Ultralight and won't add too much weight to your bicycle. Easy installation, a direct replacement for the old or broken one. The appearance is simple, generous and colorful. Suitable for Rotor 130BCD Road Bike. Road Bike Chainwheel only, other accessories shown in the picture are not included. Specification: Material: 7075 Aluminum Optional Size: 50T, 52T, 54T, 56T, 58T, 60T 50T Size: approx. 20.9x20.9x1cm / 8.23x8.23x0.39in 52T Size: approx. 21.6x21.6x1cm / 8.50x8.50x0.39in 54T Size: approx. 22.5x22.5x1cm / 8.86x8.86x0.39in 56T Size: approx. 23.3x23.3x1cm / 9.17x9.17x0.39in 58T Size: approx. 24.1x24.1x1cm / 9.49x9.49x0.39in 60T Size: approx. 24.9x24.9x1cm / 9.80x9.80x0.39in Color: Black Quantity: 1 Piece Note: No retail packaging. Please allow 0-1cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not reflect the actual color of the item. Thank you. Package Contents: 1 x Road Bike Chainwheel