Crank Model: SRAM DUB Etc. 29mm Spindle

  • External BSA Bottom Brackets

    External BSA Bottom Brackets

    Product Details

    White Industries external BSA style bottom brackets are made here in our shop and feature Enduro stainless steel angular contact bearings or optional Enduro XD-15 ceramic-hybrid radial bearings.  We offer them with three different bearing sizes to help you fit your favorite crank to your favorite bike.

    “BSA” bottom bracket shells and cups are named after the Birmingham Small Arms Company which created the thread standard used in this system.  It’s also referred to as “British” or “English” style and is the most common type of system found on modern bicycles.  The “external” designation refers to the fact that the bearings will sit outboard of your frame’s bottom bracket shell as opposed to being tucked inside the shell as you would find on some styles of BSA bottom brackets.

  • External T47 Bottom Bracket

    External T47 Bottom Bracket

    Product Details

    White Industries external T47 style bottom brackets are made here in our shop and feature Enduro stainless steel angular contact bearings or optional Enduro XD-15 ceramic-hybrid radial bearings.  We offer them with three different bearing sizes to help you fit your favorite crank to your favorite bike.  “T47” is a bottom bracket standard that White Industries helped develop in 2016 and allows for a greater weld area for bigger frame tubes as well as room inside the shell for internally routed cables and wires.

    The “T” stands for “threaded” and the “47” is the nominal 47mm outside thread diameter of the cup. T47 bottom bracket cups are not compatible with the much smaller (and more common) threaded BSA BB shells.  The “external” designation on this bottom bracket refers to the fact that the bearings sit “outboard” of 68mm and 73mm wide bottom bracket shells, as opposed to our “internal” T47 bottom brackets where the bearings sit “inboard” of 86mm and 92mm wide bottom bracket shells.  If you have an 86mm or 92mm wide T47 bottom bracket shell on your frame, you will need one of our “internal” T47 bottom brackets.

  • Internal T47 Bottom Bracket

    Internal T47 Bottom Bracket

    Product Details

    The “T” stands for “threaded” and the “47” is the nominal 47mm outside thread diameter of the cup. T47 bottom bracket cups are not compatible with the much smaller (and more common) threaded BSA BB shells.  The “internal” designation on this bottom bracket refers to the fact that the bearings sit “inboard” of 86mm and 92mm wide bottom bracket shells, as opposed to our “external” T47 bottom brackets where the bearings sit “outboard” of 68mm and 73mm wide bottom bracket shells.  If you have a 68mm or 73mm wide T47 bottom bracket shell on your frame, you will need one of our “external” T47 bottom brackets.

  • External PF30 Bottom Bracket

    External PF30 Bottom Bracket

    Product Details

    This is our PressFit 30 (PF30) bottom bracket system and incorporates a “thread-together” design that keeps the bearings aligned, prevents creaking and has a built in sleeve to protect against contamination as well as offering room for internal cable routing and wiring.  It is made in our shop and features Enduro stainless steel angular contact bearings or optional Enduro XD-15 ceramic-hybrid radial bearings.

    “PF30” is a bottom bracket shell type that was originally designed to use internal bearings (inside the BB shell) with a short, 30mm diameter crank spindle. With this thread-together bottom bracket we have located the bearings externally of the BB shell to work specifically with longer 30mm and 29mm crank spindles.