T47 12-NOTCH BOTTOM BRACKET TOOL PARK TOOL BBT-147-12

The Park Tool BBT-147-12 is the 12-notch T47 bottom bracket tool, designed to remove and install threaded bottom brackets with cups measuring 50-53 mm across the outside of the notches. It is the right tool for modern bikes with T47 shells, increasingly common on road, gravel and MTB. The T47 standard uses large-diameter threaded cups that also accept 30 mm spindles, so it needs a dedicated tool with a wide, well-centred grip: a generic tool risks slipping and damaging the aluminium notches.

It is made from precision-machined 4140 steel and built for heavy workshop use. The extra-deep body leaves room for wider spindles, while the low-profile walls at the point of engagement let you work on lockrings recessed into the shell. It offers three ways to apply force: a 3/8" drive fitting, a 1" hex and 36 mm wrench flats, especially useful with very tight or seized cups. The body also has threads for the BBT-RS Retaining System or guide pins, sold separately, which keep the tool firmly engaged with the cup while breaking it loose.

Which T47 bottom brackets the BBT-147-12 fits

• BBInfinite T47, external non-drive side and internal version
• Bikone T47 and Hambini T47
• Chris King ThreadFit 30, T47, T47 24x and T47 30
• Rotor T47 External 30 mm and T47 Internal 30 mm
• Rotor thread-together models for BBright, BB30, PF30 and BB386EVO

Why choose Park Tool BBT-147-12

• Precision-machined 4140 steel for a play-free grip on the 12 notches
• Three ways to turn it: 3/8" drive, 1" hex and 36 mm wrench
• Deep body with 42 mm internal clearance, suited to long spindles
• Low-profile walls for recessed lockrings
• Ready for the BBT-RS Retaining System

The tool is not rated for use with impact drivers: use it by hand with a ratchet or wrench. For anyone working on T47 frames, the Park Tool BBT-147-12 T47 12-notch bottom bracket tool is a precise, sturdy tool built to last for years of daily use.