Yaesport New MTB Bicycle Bike 3 x 7 Speed Shift Shifter Brake Lever Combo

Left & Right: 3 x 7 21 speeds Weight: 360g /pair Feature: 1.Suitable for 22.2mm diameter handlebar. 2.Easy to Install Suitable for all kinds of bicycle, 21 speed. The bike shifter allows you to enjoy a different riding experience 3.V-brake systems Compatible with V-brake systems and cable disc brake(Mechanical disc brake) 4.Trigger Type Handle Aluminum lever and brake cables made of stainless steel with good quality. Note:Please use the correct installation method, otherwise the product may not work properly. Installation method, Please refer to the video?https://v.youku.com/v_show/id_XMjUyNjk1MDg2NA==.html?spm=a2h0k.11417342.soresults.dtitle