3x7 21 Speed Bike Shifter And Brake Lever Set For Mountain Road BMX MTB Bicycle Upgraded Shifting And Braking Aluminum Alloy Build For Smooth Reliable Gear Changes Across Trails

Upgrade 3x7 Bike Shifter and Brake Lever Set Smooth Gears
✔️ 21-speed 3x7, aluminum alloy build for smooth shifting

This 3x7 speed bike shifter and brake lever set combines left-side 3-speed and right-side 7-speed controls with integrated brakes. Made from aluminum alloy, it's a lightweight, durable upgrade suitable for mountain bikes, road bikes, and hybrids, designed for easy installation and reliable gear changes.

✅ 3x7 speed configuration (21 speeds) with left 3-speed and right 7-speed controls
✅ Aluminum alloy construction for lightweight durability
✅ Includes cables for precise shifting and braking performance
✅ Compatible with handlebars 21-23mm diameter

💡 What is a 3x7 speed bike shifter and brake lever set used for on MTB and road bikes?
This handy component helps upgrade shifting and braking performance across a range of bicycles.
- Easy to install and replace to save time
- Provides 21 gears for a broad gear range
- Fits handlebars 21-23mm diameter for broad compatibility