【IMPROVED RIDING EXPERIENCE】Our bike shifter with 3x7 speed mountain bike thumb shifter, shift and lever types are divided into left 3 gears and right 7 gears, the bike can shift precisely, move comfortably and easily, and improve riding performance.【HIGH-QUALITY MATERIALS】The bike shifter kit is made of strong aluminum alloy, strong and durable, lightweight and easy to control. The shift cables are made of stainless steel and provide reliable performance. Long service life, you can use them with confidence.【GEAR INDICATOR】Our bike shifter is equipped with an obvious and intuitive gear indicator, which allows the rider to select the desired gear while riding, so that the gear change can be seen at a glance.【WIDELY USED】It is suitable for bicy.