Exercise Bike Resistance Knob, Sports Bike Knob, Quick Release, Maintenance

Description: [Design]: Exercise Bike Resistance Knob for most bikes and Exercise Bike. [Material]: Made of plastic and metal material, durable and functional. [Feature]: The knob small and portable, will not scratch your hands due to winding. [Easy to install]: The knob is easy to use and quick to install, it will not take up too much time for you, and it is very convenient. [Applications]: The Bike Knob Exercise Bike Accessory is widely suitable for strength and fitness equipment, exercise bikes, etc. Specification: Material: plastic Size Chart: 8 gears: 55cm/21.65inch 10 gears:110cm/43.31inch Package Includes: 1 Piece Exercise Bike Resistance Knob Note: Please allow slightly errors due to manual measurement and different monitors.