Chris King® THREADFIT™ 30 Bottom Bracket (ceramic) bromptonmods ♣ Naturally breathable material that

♣  Naturally breathable material that provides a unique type of well-being

♣ No sore wrists

170mm crankarm length (same as brompton original)

2mm pin length

Souplesse - easy rolling

Chris King® THREADFIT™ 30 Bottom Bracket (ceramic) bromptonmods ♣ Naturally breathable material thatThreadFit 30 fits 30mm and DUB spindle cranks in BSA bottom bracket shells. Our ThreadFit 30 bottom bracket is silky smooth and long lasting thanks to our legendary, angular contact bearings, both steel and ceramic, the best in the industry. They actually get faster over time as their contact surfaces wear, because we build them to ultra tight aerospace tolerances, using machined, Delrin spindle sleeves to create a perfect and precise fit between