- Classic Space-Saving Design: This mountain bike speed shifter derailleur handle grip features an elegant shape with a belt cover that minimizes space usage on your bike, making it an ideal choice for mountain and road cyclists alike. - Dual Derailleur System: The shifter is equipped with both front and rear derailleurs, ensuring smooth and efficient gear transitions. The longer line connects to the rear derailleur while the shorter line connects to the front, allowing for seamless shifting while riding. - Enhanced Control and Comfort: Designed for optimal acceleration control, the speed shifter handle grip offers a comfortable grip that facilitates precise adjustments to your bike's speed and gear settings. - Compatibility: With a diameter of approximately 22mm (0.86 inches), these speed shifters are compatible with both 7-speed and 21-speed bikes, making them versatile for various riding styles and terrains. - Practical Applications: Ideal for mountain biking on rugged trails, commuting on city roads, or weekend rides with friends, these speed shifters enhance your cycling experience by providing reliable performance and control. - Durable Construction: Made with high-quality materials, this shifter is built to withstand the rigors of biking, ensuring long-lasting performance and reliability on your rides.