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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: In stock products & small parts 3-5 days, all other products available for pre-order. Please check here for more details.
Ships To: Worldwide
Returns: 60 Day Free Returns
Guarantee: Lifetime Limited Phil Wood Warranty
Made In: San Jose, CA, USA

Color
BLACK
GUN METAL
SILVER (POLISHED)
RED
BLUE
GREEN
PURPLE
PINK
ORANGE
Size
Bearing Type
Read Before Ordering

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.

  • AVT.Bike is an authorized Phil Wood dealer and proud to carry one of the largest selections of Phil Wood products available online and shipped anywhere in the world.
  • 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.
  • We typically ship out Phil Wood product in around 3 days from placing your order, but in some cases this can take a few days longer as many hubs, headsets and BB's are built to order.
  • 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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Available For Pre Order.
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In Stock & Ready To Ship In 3-5 Days Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
Ships In Approx 6 Weeks.
In Stock & Ready To Ship In 3-5 Days Available For Pre Order.
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Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
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Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.
Available For Pre Order.
Ships In Approx 6 Weeks.