These chainrings from KMC are suitable for Bosch 4th generation motors. Guaranteed to last a minimum of 3500km, combining these with KMC's E chains to extend the life of your chain and chainring even further. Longer lasting, quality material and unparalleled gear changes.

Features

• Perfectly tailored to narrow KMC chains
• Hardened CrNo steel
• High efficiency, saves battery
• Extreme durability, highest precision
• Simple conversion
• Perfectly matched with KMC Chains

Tech Specs

• Size: 1/2" X 11/128"
• Colour: Black
• Treatment: Hardened Chromoly steel
• For Bosch 4 systems
• Direct mount: 9mm offset
• E1, E12, E11, E10, E9 & E8 chains