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Phil Wood bottom brackets are absolutely legendary. Like all Phil Wood bottom brackets, the main purpose of this bottom bracket is to be able to take the day in and day out wear and tear of both serious riders and quality product enthusiasts.

Outboard Bottom Bracket (OBB) Cups are manufactured for integrated spindle and crank systems, and are engineered with stainless steel cups for durability and longevity and with Phil Wood Premium Bearings for performance.

The aluminum inner sleeve engages into the stainless cups supported with o-rings for a secure fit and further protection from the elements, and the whole bottom bracket unit is polished to the traditional Phil Wood silver finish.

If you plan to use a SRAM GXP crankset, you will need to also purchase this adaptor separately.


This bottom bracket is serviceable and compatible with most crank manufacturers.

American made in USA (U.S.A.)




Phil Wood bottom brackets are absolutely legendary. Like all Phil Wood bottom brackets, the main purpose of this bottom bracket is to be able to take the day in and day out wear and tear of both serious riders and quality product enthusiasts.

Outboard Bottom Bracket (OBB) Cups are manufactured for integrated spindle and crank systems, and are engineered with stainless steel cups for durability and longevity and with Phil Wood Premium Bearings for performance.

The aluminum inner sleeve engages into the stainless cups supported with o-rings for a secure fit and further protection from the elements, and the whole bottom bracket unit is polished to the traditional Phil Wood silver finish.

If you plan to use a SRAM GXP crankset, you will need to also purchase this adaptor separately.


This bottom bracket is serviceable and compatible with most crank manufacturers.

American made in USA (U.S.A.)


BOSIIR-1

Phil Wood Outboard Bottom Bracket-Stainless Steel



Cup Type
Bearing Type



Availability and stock levels vary by color & specification, please check each color below for stock information.

Many Phil Wood products are available for pre-order with lead times of 1-2 weeks.

Phil Wood bottom brackets are absolutely legendary. Like all Phil Wood bottom brackets, the main purpose of this bottom bracket is to be able to take the day in and day out wear and tear of both serious riders and quality product enthusiasts.

Outboard Bottom Bracket (OBB) Cups are manufactured for integrated spindle and crank systems, and are engineered with stainless steel cups for durability and longevity and with Phil Wood Premium Bearings for performance.

The aluminum inner sleeve engages into the stainless cups supported with o-rings for a secure fit and further protection from the elements, and the whole bottom bracket unit is polished to the traditional Phil Wood silver finish.

If you plan to use a SRAM GXP crankset, you will need to also purchase this adaptor separately.


This bottom bracket is serviceable and compatible with most crank manufacturers.

American made in USA (U.S.A.)

  • Most Phil Wood products are now available for pre-order with a 1-2 week lead time.
  • Phil Wood hubs & headsets are available in a range of colors which may vary by product so please consult the specific product page for details on available options.
  • Other colors and product options are available depending on stock levels, so if you don't see the color or exact product you are looking for please contact us.
  • If you have any technical questions at all on Phil Wood products please contact us and we'll be pleased to help you out!
  • All Phil Wood products are responsibly manufactured in San Jose, California, USA.
  • All Phil Wood products carry a lifetime, limited warranty.
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