Bike Gear For Cycling Efficiency

- This bike single cassette cog made of stainless steel material, high strength, strong and solid for long time using. - Size: Single , : 12-18T (/14//17/18T) - Efficient , uniform force, highly lubricated, smooth and labor saving . - Hollow out design, increasing hardness while reducing weight. Easily to be removed or installed by tool. - Reinforced ratchet, and impact resistant, riding. Specification: - Material: Stainless Steel - Color:Silver Package Includes: 1 Piece Cassette Cog