Phil Wood Outboard Bottom Bracket - Silver

We manufacture our Outboard Bottom Bracket (OBB) Cups for 24 mm integrated spindle and crank systems from US-produced 7075 aluminum and stainless steel. Each OBB cup, center sleeve and spacer is machined in-house to the same high-quality standards we apply to all of our products.

All of our OBB cups come with our Standard 6805 bearings which have a full contact seal and a 100% fill with our Phil Waterproof Grease. You can also order your OBB cups with our low drag Carbonyte bearings. To learn more about our bearings please visit our Bearings section.