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Phil Wood manufactures their new 2nd Generation Aluminum Outboard Bottom Bracket (OBB) Cups for integrated spindle and crank systems from US-produced 7075 aluminum. To fit Shimano 24mm cranks, or SRAM GXP cranks.

Each OBB cup, center sleeve and spacer is machined in-house to the same high-quality standards they apply to all of their products. These cups are only available in British threading, and in 68/73, 83 and 100mm spacing. All of their 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 their low drag Carbonyte bearings. Their Carbonyte bearings have different internal specifications, use a low drag seal and Phil's full synthetic Carbonyte grease.

These aluminum OBB cups are available in 9 anodized colors and high polished finish as the rest of Phil's products for a coordinated color match.

Each OBB comes with a set of cups, a center sleeve (please specify your desired application width), and (3) 2.5 mm spacers that match the color of your cups (No color substitutions allowed).

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

Please note: You can purchase center sleeves and spacers separately. When ordering replacement dust covers, remember that these OBBs use Phil's standard size dust covers.

Fitting Instructions can be found here.

BOSAB

Phil Wood Aluminum Outboard Bottom Bracket

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

Many Phil Wood products are currently on back order and lead times are long.

More Details On Availability Here
Color
BLACK
GUN METAL
SILVER (POLISHED)
RED
BLUE
GREEN
PURPLE
PINK
ORANGE
Size
Bearing Type

Phil Wood manufactures their new 2nd Generation Aluminum Outboard Bottom Bracket (OBB) Cups for integrated spindle and crank systems from US-produced 7075 aluminum. To fit Shimano 24mm cranks, or SRAM GXP cranks.

Each OBB cup, center sleeve and spacer is machined in-house to the same high-quality standards they apply to all of their products. These cups are only available in British threading, and in 68/73, 83 and 100mm spacing. All of their 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 their low drag Carbonyte bearings. Their Carbonyte bearings have different internal specifications, use a low drag seal and Phil's full synthetic Carbonyte grease.

These aluminum OBB cups are available in 9 anodized colors and high polished finish as the rest of Phil's products for a coordinated color match.

Each OBB comes with a set of cups, a center sleeve (please specify your desired application width), and (3) 2.5 mm spacers that match the color of your cups (No color substitutions allowed).

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

Please note: You can purchase center sleeves and spacers separately. When ordering replacement dust covers, remember that these OBBs use Phil's standard size dust covers.

Fitting Instructions can be found here.

  • Please note that Phil Wood production is very delayed right now due to unprecedented demand. If the product you are looking for is not in stock you can still pre-order it but it may be a long wait (up to 3 months).
  • 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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