Gear Shifter, SL M310 3 Speed or 8 Speed Left, Aluminum Alloy Trigger, for Mountain Bicycle Gear Change 3 Speed Left

• High Quality Aluminum Alloy & Resin – Sturdy with Long Service Life: This shimano (model compatibility) thumb shifter is made of high quality aluminum alloy and resin materials, which is sturdy and has a long service life. (Note: Brand name is for reference only.)
• Dimensions – 12.9cm Length, 6cm Width, 4cm Height: The v brakes compatible shifter measures 12.9cm in length, 6cm in width, and 4cm in height. Fits standard mountain bike handlebars.
• 24‑Speed Transmission – Used for Mountain Bikes: This gear shifter features 24‑speed transmission and is used for mountain bikes. Ideal for trail and off‑road riding.
• Ergonomic Trigger Handle – Easy & Comfortable Ride: The 7 speed shifter has an ergonomically designed trigger handle, making the ride easy and comfortable. A reliable bike gear shifter for daily use.
• Practical Function – See Speed Changes & Fine‑Tune with Your Hands: This Bike Speed Shifter allows you to see speed changes and fine‑tune the speed with your hands. Also known as Bicycle repair parts or Trigger shifter.

You are upgrading the shifting components on a mountain bike or replacing a worn lever on a commuter. A compact, handlebar-mounted shifter that sits within reach of your thumb can make gear changes faster and more precise. This bicycle thumb shifter controls a 3-speed front chainring and an 8-speed rear cassette, giving you 24 gear combinations for varied terrain. The main body is made from an aluminum alloy casting with a matte black finish, while the two trigger levers and handlebar clamp are molded from a durable resin composite. The clamp ring fits standard 22.2mm diameter handlebars and tightens with a single 5mm hex bolt, holding the shifter securely in position. The shifter uses a two-lever design: a short thumb paddle to shift to a larger cog (or lower gear) and a longer index-finger trigger to release cable tension and move to a smaller cog (or higher gear). Each click moves the derailleur a fixed distance per gear, providing consistent, repeatable shifts across the entire cassette range. The cable entry port accepts universal shift cable heads with a 4‑mm barrel end, and a rubber cover helps keep trail out of the internal mechanism. A small window on the top shows the current gear position at a glance. Use this shifter on the left side for front shifting or on the right side for the rear. The shift levers are textured for a non‑slip grip, and the metal components are anodized to resist corrosion from sweat and moisture. Item Name: M310 Thumb Shifter Material:Resin,Aluminum Alloy Model: SL-M310 Size:12.9cmx6cmx4cm/5.08inx2.36inx1.57in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Brake Line 1 X Thumb Shifter (3 Speed Left or 8 Speed Right)