Birzman Bottom Bracket Cup Tool Adapter (for BB9000 & BBR60) Compatio_Enriched Triple chainrings are not supported

Triple chainrings are not supported (medium cage rear derailleurs cannot accommodate that big of a range)

lightweight package

Zero Stack

Chainline: 51

100% Water / Vibration proof

Birzman Bottom Bracket Cup Tool Adapter (for BB9000 & BBR60) Compatio_Enriched Triple chainrings are not supportedConvenient adapter allows you to use your standard Hollowtech II BB tool on a BB9000 or BBR60 bottom bracket. Constructed of hardened steel Laser etched makings indicate BB type Insert into any Hollowtech II bottom bracket tool for compatibility with newer generation 39mm and 41mm outer diameter Shimano external bottom brackets like those found on Dura Ace 9000, XTR 9000 and Ultegra 6800