Description
⭐ Key Features
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Left Shifter: 3-Speed (Front)
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Right Shifter: 7-Speed (also compatible with 8-speed setups)
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Brake Compatibility:
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V-Brake
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Mechanical Disc Brake
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Handlebar Size: 22.2mm (Standard MTB/Hybrid)
🔧 Product Features
🔄 Flexible Gear Shifting
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Smooth, precise indexing
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Light lever action for comfortable riding
👁️ Visible Gear Display
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Clear optical gear indicator
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EF500-style straight-line gear window for easy visibility
✋ Ergonomic Brake Lever
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Comfortable finger positioning
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Integrated trigger handle for better control
🔩 Easy Installation
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Plug-and-play design
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Works immediately when installed correctly
🆚 EF500 vs ST-EF51 (Important Note)
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ST-EF51: Round optical gear window
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EF500: Straight-line gear display (easier to read)
EF500 is the upgraded version with improved visibility and modern design.
⚙️ Compatibility Notes
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Designed for V-brake and mechanical disc brake systems
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Best performance achieved when shifter and derailleur models match
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Suitable for MTB, city, and commuter bikes






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