Description: 【Versatile Compatibility】: Designed to fit a wide range of bicycles, this twist grip gear shifter is great for both road and mountain bikes, offering seamless integration with 18/21 speed systems 【Smooth Shifting Performance】: Experience accurate and reliable gear changes with the speed lever shift mechanism, ensuring a smooth ride across various terrains 【Ergonomic Design】: The derailleur handle bar twisted grips are crafted for comfortable and control, providing an ergonomic grip that reduces hand uncomfortable during long rides 【Quality Construction】: Built to withstand the rigors of cycling, this shifter is made from quality materials that ensure longevity and consistent performance in weather conditions 【Easy Installation】: With its user friendly design, replacing your old gear shifters with this universal transmission replacement is quick and straightforward, making it an ideal choice for DIY bike enthusiasts Specification: Material: ABS Plastic Size Chart: 8.5cmx7cmx4.5cm/3.35inchx2.76inchx1.77inch Handle Size: 7cmx2.5cmx2.5cm/2.76inchx0.98inchx0.98inch Package Includes: 2 Bike Twist Grip Shifters 2 Bike Handle Grips Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.