SunRace STM-406 3x8 Speed Trigger Shifter Set with V-Brake Levers – Black – Shimano Compatible 22.2 mm Clamp (Pair).

Each lever features SunRace’s 2:1 SIS-compatible cable pull ratio, providing crisp shifting that matches Shimano systems perfectly. With its durable construction, optical gear display, and ergonomic feel, the STM-406 is a dependable, easy-to-install upgrade or replacement for worn-out Shimano EF-series units.

🔹 SPECIFICATIONS

• Brand: SunRace

• Part Type: Integrated Trigger Shifter & V-Brake Lever Set (Right & Left Pair)

• Model: STM-406

• Shifter Style: Trigger / Integrated Brake Lever Combo

• Speeds: 3x8 (24-Speed Total)

• Compatibility: Shimano SIS 2:1 Actuation Systems

• Brake Type: V-Brake / Linear Pull Compatible

• Color: Black

• Material:

  • Reinforced polymer body

  • Alloy brake levers

  • Hardened steel internal indexing system

• Left/Right/Pair: Pair (Left + Right)

• Sold As: Set (Both Levers)

• Clamp Size: 22.2 mm (7/8”) – standard flat/riser handlebar fit

• Cable Type: Standard brake and shift cable compatible

• Country/Region of Manufacture: Taiwan

🔹 DIMENSIONS

• Handlebar Fit: 22.2 mm (7/8”)

• Lever Length: 120 mm

• Item Width (each): 90 mm

• Item Height (each): 45 mm

🔹 COMPATIBILITY

✅ Fully Compatible With:

• Shimano 3x8 (24-speed) drivetrain systems (Tourney TX, Altus, Acera, Alivio)

• Shimano 2:1 indexed front and rear derailleurs

• SunRace derailleurs using Shimano-standard actuation

• V-brake and linear-pull brake systems

• Standard 22.2 mm flat or riser handlebars

❌ Not Compatible With:

• Hydraulic braking systems

• Drop-bar or road caliper setups

• SRAM 1:1 actuation systems

🔹 FEATURES & PERFORMANCE

• ✅ Full 3x8 Speed Set:
  Left 3-speed front and right 8-speed rear trigger shifters with integrated V-brake levers.

• Shimano-Compatible 2:1 Indexing:
  Provides accurate, consistent gear changes across all 24 speeds.

• Dual Trigger Mechanism:
  Independent thumb and index levers offer precise control and quick shifts.

• Alloy V-Brake Levers:
  Lightweight yet strong, offering smooth braking and solid lever feedback.

• Optical Gear Displays:
  Easy-to-read gear indicators for both front and rear shifters.

• Reinforced Composite Construction:
  Durable housing and steel internals for long-lasting reliability.

• Ergonomic Lever Shape:
  Comfortable hand positioning for fatigue-free riding and natural reach.

• Easy Installation:
  Fits any standard 22.2 mm handlebar; compatible with standard brake and shift cable routing.

🔹 COLOR & FINISH

• Primary Color: Matte Black

• Finish: Textured polymer housing with polished alloy brake levers

• Gear Display: Transparent lens with numbered 1–3 (front) and 1–8 (rear) indicators

🔹 IDEAL FOR

• Mountain Bikes (MTB)

• Hybrid / Trekking Bicycles

• Comfort / City Bikes

• 3×8 (24-Speed) Drivetrains

• V-Brake and Linear Pull Braking Systems

🔹 PACKAGING CONTENTS

• 1 × Left 3-Speed Trigger Shifter with Integrated Brake Lever

• 1 × Right 8-Speed Trigger Shifter with Integrated Brake Lever