BBT-18 8-Notch Bottom Bracket Tool

Description

The Park Tool USA BBT-18 8-Notch Bottom Bracket Tool is a heavy-duty bottom bracket tool designed for installing and removing select eight-notch bottom bracket cups and lockrings. Ideal for Shimano Octalink and ISIS-style systems, this shop-quality tool fits a range of bike crank and bottom bracket assemblies with secure, positive engagement.

• Compatible with Shimano Octalink drive-side bottom bracket cups that use external 8-notch engagement.
• Fits ISIS Drive bottom bracket cups, including select Truvativ and Bontrager applications.
• Also works with certain chainring lockrings on Bosch Gen 3, Gen 4, and Gen 5 e-bike systems.
• Suitable for some Specialized Levo Brose front chainring lockrings.

Built by Park Tool from durable investment-cast steel, the BBT-18 is made to handle repeated service without slipping or rounding off the notches. It features 8 notches with a nominal 43.4 mm outside diameter, a 22.5 mm center opening, and 36 mm wrench flats for use with a shop wrench. This makes it a dependable choice when you need a bbt- bottom bracket tool replacement for worn or missing service tools. Installation is generally straightforward for experienced home mechanics, and many users pair it with a large wrench rather than a pedal wrench for better leverage and control.

If you need a reliable Park Tool USA BBT- bottom bracket tool for older Shimano or ISIS-compatible systems, this is an OEM-quality replacement that ships same day from our warehouse.