Ti Sealed Bottom Bracket (Japan Bearing)

Our number 1 product had been evolving into version 2. The nick name “Nude BB” had been given by the Brompton community due to its clean and direct design.

The principal design concept on the BB is very simple, it’s to make a silky smooth, light and yet stiff BB that is exclusively for the Brompton.

Please do not offer this BB to your (non-Brompton) bike, as it is designed to fit the asymmetrical designed frame of Brompton.

Aerospace grade Titanium, Ti-6AL-4V, had been used to produce the main axle by going through a lengthy CNC machining. The hollow titanium axle is strong and stiff enough to hold off a 120 Kg testing rider on some rough terrains with its weight limiting to 142 grams.

This BB is design to offer a worry free direct replacement to the original BB. Your crank and pedaling system would be reminding the same with the extra smoothness and lightness begin added on.

This version of our titanium BB had made with several improvements over our previous version.

More DIY Installation friendly – This version of the BB is more tool’s friendly. It is now fully compatible with the 6-notch SC-S and AC-H cartridge cups standard, that are currently begin used on the original Brompton BB. So, if you can remove the original, you will be able to install our silky smooth BB.

Better Chance to get it right – The previous version may require special installations skills to ensure the BB is running at its maximum smoothness. With the latest adjusted design, it will just work right out of the box. No more secret installation formula is required. As simple as that.

Top end Japaness steel balls bearings were used at this ceramic version of the BB.

Its net weight is 142 grams (+/- 5 grams). It saves slightly 100 grams over the original Brompton square taper bottom bracket.

Taper Standard: JIS
Net weight: 142 grams
Original weight: 249 grams