Bike Front & Rear Derailleur Set Shift Lever~ Pair

st-ef51-8r shift lever is designed to make the shifting and braking process smoother - compatible with v-brake systems and cable disc brake (mechanical disc brake) - easy to use 8-speed bike levers shifter uses a trigger-style handle, allowing the rider to use different fingers instead of thumbs to shift gears, ensures easy and comfortable shifting operations - trigger type handle: right shifter is a trigger-type 8 speed shifter, with one lever for down-shifts and a thumb button for up-shifts. left shifter is a ratcheting thumb lever for triple cranksets.  - clear gear display shows the rider which gear is selected during riding, which makes gear change be clear at a glance. - high quality shift lever made of aluminum alloy and unbreakable plastic, with the best performance and maximum safety - equipped with a shifting cable. - suitable for 22.2mm diameter handlebar (the most common handlebar size) - excellent replacement part for mountain bicycle, road bike, folding bike,