Many mountain bikes use straight handlebars. Whenever the bike encounters a steep slope or is about to accelerate, it is easy to grab the lone wheel. It not only reduces the pedaling efficiency, but also is prone to danger. In order to avoid this situation, adding auxiliary handles at the ends of the handlebars on both sides to increase the pedaling efficiency and improve the comfort of long-distance riding has become the mainstream of mountain bike modification. Before installation, in addition to preparing a set of vice handles, you also need to use an Allen key. The handlebar must clear the space for installing the sub-handlebar. After moving out of position, loosen the fixing screw of the sub-handlebar and install it on the grip. When installing, pay attention to whether the end of the auxiliary handle is aligned with the handle. After the strip is just right, you can cover the handle end sleeve. When the auxiliary handles on both sides are installed, you can try which angle is more suitable for your riding habits. After the angle is set, lock the fixing screws, and you are done.