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✅ Fits a BSA frame. The threaded BSA interface suits frames built around a BSA bottom bracket shell.
✅ Takes the wider spindle. The 30 mm internal diameter matches a compatible 30 mm crank spindle.
✅ Light alloy body. The aluminium alloy body weighs approximately 95 g, as stated.
✅ For a rebuild or swap. One bottom bracket is supplied, ready for a planned build or replacement.
Join a 30 mm Crank to a BSA Frame
A BSA30 bottom bracket with a 30 mm internal diameter for compatible crank spindles, made in aluminium alloy. It fits frames with a threaded BSA bottom bracket shell and weighs approximately 95 g. One bracket is supplied; check frame and crank dimensions before fitting.
Technical details
- Model: BSA30
- Material: aluminium alloy
- Internal diameter: 30 mm
- Frame interface: BSA
- Approximate weight: 95 g





Check your frame and crank, then fit the BSA30.
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