Park Tool BBT-9 Fits Shimano Hollowtech II Bottom Bracket Cups Derailleur so you can explore your

so you can explore your freedom

>Store additional layers and accessories in internal zipped pocket

All Astra lenses are polarized

Drawstring hood minimizes points of entry for unwanted moisture

Protective and grippy and built on a midsole with premium energy return and cushioning

Park Tool BBT-9 Fits Shimano Hollowtech II Bottom Bracket Cups Derailleur so you can explore yourBicycle bottom brackets occasionally require removal for service, replacement, or upgrading. The Park Tool BBT 9 is used to remove and install select threaded bottom brackets with 16 notch tool fittings, including Shimano, SRAM GXP, Chris King, Campagnolo, and many others. This tool fitting is also found on some disc brake rotor lockrings. Additionally, the BBT 9 includes a tool that removes and installation of 8 point Shimano Hollowtech II crank arm