Park Tool BBT-135-12 Steel Bottom Bracket Tool

Park Tool BBT-135-12 Steel Bottom Bracket ToolConstructed from precision machined 4140 steel, the BBT 135 12 is a heavy duty tool for the removal and installation of select threaded bottom brackets with 12 notch tool fittings, including Praxis Works M30. The BBT 135 12 is designed to be compatible with any bottom bracket with the corresponding tool fitting, with an extra deep body to accommodate extra wide spindles and low profile walls at the point of engagement for recessed lockrings. The BBT

Constructed from precision-machined 4140 steel, the BBT-135-12 is a heavy duty tool for the removal and installation of select threaded bottom brackets with 12-notch tool fittings, including Praxis Works® M30. The BBT-135-12 is designed to be compatible with any bottom bracket with the corresponding tool fitting, with an extra-deep body to accommodate extra-wide spindles and low-profile walls at the point of engagement for recessed lockrings. The BBT-135-12 has three methods of tool engagement—a 3/8" drive fitting, a 1" hex fitting, and 36 mm wrench flats—allowing you to take on even the most seized bottom bracket cups. For added stability, the BBT-135-12 features integrated threads for use with the Park Tool BBT-RS Bottom Bracket Tool Retaining System or GPS-1 Guide Pins (each sold separately).

Fits 12-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 48–50 mm and a minor diameter (inside of notches) of 46.3 mm, including Praxis Works® M30.

Tool specifications:

• 3/8" drive fitting
  
• 1" and 36 mm wrench flats
  
• 57.5 mm (2.264") outer diameter at point of engagement
  
• Internal clearance: 42 mm (1.654") depth