Park Tool

Steel Bottom Bracket And Lockring Tool BBT-118

Park Tool’s BBT-118 Steel Bottom Bracket and Lockring Tool is a heavy-duty, shop-grade solution for removal and installation of select bicycle bottom brackets and lockrings that use an 8-notch tool fitting. Precision-machined from 4140 steel, it’s built to handle repeated high-torque service while maintaining accurate engagement for clean, controlled drivetrain work.

• Precision-machined 4140 steel - Delivers durability and consistent fit under high torque for reliable bottom bracket and lockring service
• 8-notch interface - Designed for secure engagement on select 8-notch bicycle components to reduce slip and tool damage
• Extra-deep body - Provides clearance for extra-wide spindles commonly found on modern crank and bottom bracket systems
• Low-profile engagement walls - Helps reach and drive recessed lockrings where bulkier tools can’t fully seat
• Three drive options - Works with a 3/8" drive ratchet/torque wrench, a 1" hex, or 36mm wrench flats for flexible shop setups