Park Tool BBT-147-12 Bottom Bracket Tool

The BBT-147-12, made from precision-machined 4140 steel, is a high-performance tool for removing and installing select threaded bottom brackets with 12-notch tool slots, including Chris King® ThreadFit™ T47 and ThreadFit™ 30. The BBT-147-12 is designed to be compatible with any bottom bracket featuring the corresponding tool socket. It features an extra-deep body to accommodate extra-wide axles and flat walls at the engagement point for recessed lockrings. The BBT-147-12 offers three ways to engage the tool—a 3/8" drive, a 1" hex adapter, and 36-mm spanner flats—so you can loosen even the most stubborn bottom bracket shells. For added stability, the BBT-147-12 features integrated threads for use with the Park Tool BBT-RS Bottom Bracket Tool Retention System or the GPS-1 guide pins (each sold separately).

Features of the Park Tool BBT-147-12 Bottom Bracket Tool

Compatible with 12-notch threaded connections on bottom brackets with a major diameter (outside the notches) of 50–53 mm and a minor diameter (inside the notches) of 48.2 mm, including:

• BBInfinite® T47
• Chris King® ThreadFit™ 30
• Chris King® ThreadFit™ T47
• Chris King® ThreadFit™ T47 24x
• Chris King® ThreadFit™ T47 30
• Hambini T47
• Rotor® T47 External 30 mm
• Rotor® BBright®, BB30, BB386EVO, and PF30 thread-together

Tool specifications:

• 3/8" drive
• 1" and 36 mm wrench flats
• 57.5 mm (2.264") outer diameter at the engagement point
• Internal dimensions: 42 mm (1.654") depth (from front of tool) x 30.44 mm (1.198") diameter
• Not suitable for use with impact wrenches