Bosch Gen 3 Super Narrow Chainrings

These chainrings from KMC are suitable for Bosch 3rd 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** * Treatment: Hardened Chromoly 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 3 systems * Direct Mount; 3mm offset * E1, E12, E11, E10, E9 & E8 chains