Park Tool BBT-118
The Park Tool BBT-118 is an 8-notch bottom bracket tool with a 37.6 mm internal diameter, compatible with Shimano Octalink, ISIS Drive, and Bosch e-bike motor chainring lockrings. Mechanics use it for bottom brackets and mid-drive motor service across multiple platforms.
- Shimano Octalink drive-side bottom bracket cups with external notches
- ISIS Drive bottom bracket cups including Truvativ and Bontrager
- Front chainring lockring for Bosch Gen 3, Gen 4, and Gen 5 e-bike systems
- Front chainring lockring for Specialized Levo Brose e-bike systems
- 8 notches with a nominal inside diameter of 37.6 mm and outside diameter of 42.7 mm
- Internal clearance: 31.14 mm (1.226") depth (from tool face) x 22.48 mm (0.885") diameter
Pairs well with
Park Tool BBT-118
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