1. Installation method: (1). Apply some detergent or soap solution on the inner wall of the sleeve (a little lubrication is enough, and it can be air-dried after the sleeve is installed) (2). Spray some water on the handlebar, and then cover it, it is easy to get it done, and it does not require much effort. (3). If there is an air pump in a nearby car shop, use the air pump to blow the inner wall of the inner handle, and the installation is easy! 2. Common problems: The position of the handlebar is not enough, adjust the screws of the finger puller and the brake to the middle, the auxiliary handle is not installed firmly and idling, first move the installation position of the finger pull and the brake in the middle to ensure that the auxiliary handle is fixed to the car when it is installed. Bundle. 3. Material: Silicone 4. Comfortable grip: The most natural TRP rubber material is used, which is comfortable to grip and has good wear resistance. The shock-absorbing meat ball design reduces vibration when riding. 5. Inner diameter: 22.2mm; length: 130mm*30mm