Park Tool BBT-18 Bottom Bracket and Lockring Tool - 8-Notch
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The Park Tool BBT-18 is a heavy-duty, investment-cast tool designed for removing and installing components with an eight-notch tool fitting. It is compatible with select cartridge bottom brackets, including Shimano Octalink and ISIS Drive systems, as well as chainring lockrings on Bosch Gen 3/Gen 4 and Specialized Levo Brose e-bike drivetrains. With 36mm wrench flats and a 43.4mm outside diameter, this tool offers reliable performance for professional and home mechanics.
add_circle The Upside
- check Versatile compatibility with multiple bottom bracket and e-bike systems
- check Durable investment-cast steel construction
- check Easy to use with standard 36mm wrench
remove_circle The Downside
- close Not compatible with 30mm spindles due to 22.5mm center hole
- close Limited to 8-notch fittings only
- close May require additional adapters for some applications
Specifications & features
Key features
- check_circle Heavy-duty investment-cast construction
- check_circle 8-notch tool fitting with 43.4mm outside diameter
- check_circle Compatible with Shimano Octalink and ISIS Drive bottom brackets
- check_circle Works with Bosch Gen 3/Gen 4 and Specialized Levo Brose e-bike lockrings
- check_circle 36mm wrench flats for use with a wrench or socket
Specifications
Center Hole Diameter
22.5 mm
Material
Investment-cast steel
Notch Count
8
Outside Diameter
43.4 mm
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