Park Tool BBT-2 For installing & removing 20-spline, 32 mm diameter bottom bracket cups. This tool is very similar to the BBT-22 (the BBT-2 fits the same bottom brackets, and has a 3/8" drive fitting and 1 1/4" wrench flats, but not 1" wrench flats). Helpful links:

Bottom Bracket Tool

Updated: 19 Oct 2026