Upgrade your i9 or i9 Pro electric scooter's stopping power with our new brake spring. Precisely engineered for maximum responsiveness, it ensures safety and performance, delivering smoother, more controlled deceleration. Enhance your scooter's reliability and enjoy confident rides every time. This brake spring is suitable for i9 or i9 Pro Electric Scooter , you can use it to replace the old one if you want to fix this part.