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Phil Wood Aluminum Outboard Bottom Bracket

Ready To Ship In: 2-5 Days
Ships To: Worldwide
Returns: 60 Day Free Returns
Guarantee: Lifetime Limited Phil Wood Warranty

Bearing Type
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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.

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).

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.
  • Cup Material:  7075 Aluminum
  • Center Sleeve Material: 6061 Aluminum
  • Cup Threading Type: British (1.370 x 24 tpi, RH/LH thread)
  • Bottom Bracket Application Widths: 68/73 mm, 83 mm, 100 mm
  • BB Spindle Size: 24mm (Shimano or SRAM GXP)
  • Bearing Availability: 
    • Standard 6805
    • Carbonyte 6805 (Low Drag) 
  • Cup Set Weights: 
    • 68/73 mm, 142 grams
    • 83 mm, 150 grams
    • 100 mm, 158 grams

  • 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 designed and manufactured in San Jose, California, USA.
  • All Phil Wood products carry a lifetime, limited warranty.