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Hi, Nate Taylor here. Please reach out to me at nate@sscycleworks.com for inquiries on parts availabilities and shipping estimates.

Vintage Components - Brompton bottom bracket parts

Brompton bottom bracket parts on this page: Brompton English-threaded cups

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Brompton English-threaded cups. Used, $20.00/set

These cups came from an old Norman bike, probably made in the 1950s, perhaps even older than that.

Brompton English-threaded cups.

The bearing surfaces

Close-up of the fixed cup

The fixed cup from a different angle

Close-up of the adjustable cup and lock ring.

The adjustable cup turned around for another view