PARK TOOL BBT-18 BB Tool - Isis BB trike 40-Series Zero Stack headsets set

40-Series Zero Stack headsets set the standard for performance

It protects your derailleur against chain jams by pivoting back and out of the way

The wool wicks moisture away from feet

HRM-Pro Plus transmits real-time heart rate data to compatible devices

PARK TOOL BBT-18 BB Tool - Isis BB trike 40-Series Zero Stack headsets setPark Tool BBT Series Bottom Bracket Tools. Used to remove and install all Shimano ISIS Drive and ISIS Overdrive eight notch bottom bracket cups 36mm wrench flats Compatible with Bosch: Active Line, Active Line Plus, Performance Gen 3, and Gen 4 ebike systems and also Specialized: Levo Brose ebike systems