[Product Information]

• Compatible with 21 speed， front 3 speed and rear 7 speed cassettes/freewheels and triple cranks
• Compatible with V-brake systems
• Suitable for 22mm diameter handle， with an Allen wrench installation
• Trigger type handle， make it easier for variable speed operation
• NOTE: Genuine Shimano ST-EF51 3x7 Speed Shifter， particularly sold by "The seller88"