This Shimano HG-400 computer designed Hyperglide (HG) sprocket incorporates a specifically positioned shift ramp and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result.
• Use: MTB/Trekking
• Fast, quiet and smooth shifts
• Teeth have holes for weight-savings
• Compatible with IG chains
• Group: Alivio/ 9-speed
• Teeth: 11-25
• Gearings: 11-12-13-15-17-19-21-23-25