Item # BBT-18
Bottom Bracket Tool
The BBT-18 is a heavy duty, investment cast tool for installing and removing the following eight-notch bottom bracket cups:
- Shimano Octalink- right cup with external notches
- ISIS Drive
Note: The BBT-18 is an updated version of the current BBT-8. The outside diameter of the tool has been changed so it provides a universal fit on all Shimano and ISIS Drive eight-notch cups.+
The BBT-18 has 8 notches with an outside diameter of nominally 43.4mm. The inside-to-inside width is approximately 38mm. Each notch is approximately 3.9mm wide. The hole in the center of the casting is 22.5mm, and will not fit over the 30mm spindles.
See Cartridge bearing type bottom bracket service for service procedures.
Related Repair Articles:
-
Cartridge Bearing Type Bottom Bracket Service
This article will discuss the removal and installation of the common cartridge bottom brackets of the three-piece cra... more
-
Chainring Spider Removal
This article will discuss the use of the BBT-18 (or older BBT-8) to remove some crankset spider lockrings. more
Follow Calvin's Corner:
Packed with hundreds of photos and procedures, the
Learn bicycle repair from your local bike shop in this hands-on clinic. Find a local Park Tool School or Learn More.





