? QUIET: Made of high-quality nitrile rubber, wear-resistant, does not hurt the rim, and can effectively reduce the sound of braking, so that you can say goodbye to the harsh noise, and every time you brake is so comfortable. If there is a sound after installation, please adjust the installation position and angle more. | ? LIMIT MARK: Intimate "LIMIT" word, timely reminder to replace the brake pads to prevent accidents and safe riding. Employ raised rubber text that lasts longer than printed text and won't be washed away by rain and soil. | ? LONG SERVICE LIFE: The experimental test shows that when the speed is 12.5KM/H, the brake pad can be used 8000-10000 times. And the curved design fits the radian of the tire more, making riding safer. | ? TWILL DRAINS: The twill drain boxes on our brake pads help stop the bike's power in the worst weather conditions than the rib drain grooves, and the grooves help drain water and indicate wear. | ? COMPATIBLE WITH ALL V-BRAKE SYSTEMS: Compatible with most V-brake road and mountain bikes. Each set includes 3 pairs of 70mm pads. And there are left and right distinguishing signs, which is more convenient to install.