Crank Spindle Diameter: 29mm

  • Bottom Bracket Bearings

    Bottom Bracket Bearings

    Since 1996 White Industries has partnered with the folks at Enduro to ensure that the bearings we install in all our products are of the highest standards.  Along the way Enduro has continually sought out better materials, seals, greases, tolerances and manufacturing techniques to stay on the cutting edge of bearing development and performance.  Our hubs come standard with Enduro high-carbon chromium steel bearings which have the best price/performance ratio, but if you are seeking the absolute pinnacle of bearing performance, we also offer Enduro XD15’s which features ceramic balls rotating in aerospace developed, nitrogen-infused, super-stainless-steel bearing races and come with a limited lifetime warranty.

    Specs

    • Bearings sold individually
    • Grey seals always face out
    • Green seals face out
    • Bearings should be installed using a bearing press
      • See Tools>Bearing Presses
    • Refer to the Bottom Bracket pages or the tables below to determine your bottom bracket model and bearing size

    Compatibility

    • 29mm and 30mm bearings use the same cups and can be swapped back and forth
    • 24mm bearings have a smaller outer diameter than the 29mm and 30mm bearings
      • You can’t put a 24mm bearing in a cup that had a 29mm or 30mm bearing in it
      • You can’t put a 29mm or 30mm bearing in a cup that had a 24mm bearing in it
    • 30mm Heavy Duty bearings with a 47mm OD use special cups
      • Only fits T47 External Heavy Duty BB

    Standard Bearing Specs

    Spindle 

    Diameter

    		 Inside/Outside/Width

    (mm)

    		 Material

    &

    Type

    		 Installation Direction

    White Industries Part #

    17mm

    (Square taper spindle)

    		 17x30x7 Chromium Steel

    Non angular contact

    		 Grey seals face out

    BR6903

    24mm

    		 24x37x7 Stainless Steel

    Angular contact

    		 Green seals face out

    BR2437

    29mm

    (SRAM DUB)

    		 29x42x7 Stainless Steel

    Angular contact

    		 Green seals face out

    BR6806/29

    30mm Standard

    		 30x42x7 Stainless Steel

    Angular contact

    		 Green seals face out

    BR6806

    30mm Heavy Duty

    (Only fits T47 External Heavy Duty BB)

    		 30x47x9 Chromium Steel

    Non angular contact

    		 Either direction

    BR6906

    Ceramic Bearing Specs

    Spindle 

    Diameter

    		 Inside/Outside/Width

    (mm)

    		 Material

    &

    Type

    		 Installation Direction White Industries Part #

    17mm

     (Square taper spindle)

    		 17x30x7 Ceramic balls/martensitic stainless races Either direction

    BR6903XD

    24mm

    		 24x37x7 Ceramic balls/martensitic stainless races Either direction BR2437XD
    29mm

     (SRAM DUB)

    		 29x42x7 Ceramic balls/martensitic stainless races Either direction

    BR6806/29XD

    30mm Standard

    		 30x42x7 Ceramic balls/martensitic stainless races Either direction

    BR6806XD
    30mm Heavy Duty

    (Only fits T47 External Heavy Duty BB)

    		 30x47x9 Ceramic balls/martensitic stainless races Either direction

    NA

    What’s In The Box

    • One bearing, sold individually

     

  • Bottom Bracket Spindle Spacer Kits

    Bottom Bracket Spindle Spacer Kits

    With all the different bottom bracket styles, frame manufacturers, and component makers out there you’re bound to run into situations where spindle spacers may be needed to make your particular frame/crank/bottom bracket combination fit correctly together.  Because there’s no way for us to know what your particular situation might be, we offer “kits” to cover a wide variety of combinations.

    We offer three spindle kits for 24mm, 29mm and 30mm spindles.  The 24mm and 30mm spindle kits also come with one “wavy” washer which goes on the spindle and acts as a bearing “preload” mechanism for crank arms that do not use a built-in bearing preload adjuster.

    Specs

    • The 24mm spindle kit includes:
      • Two .5mm spindle spacer, nylon
      • Three 1mm spindle spacers, aluminum
      • Two 2.5mm spindle spacers, aluminum
      • One 24mm wavy washer, steel
      • Spacers/wavy washer go between the bottom bracket seals and the crank arm
      • Fits 24mm spindle cranks such as Shimano, etc.
    • The 29mm spindle kit includes:
      • Two .5mm spindle spacer, nylon
      • Three 1mm spindle spacers, aluminum
      • Two 2.5mm spindle spacers, aluminum
      • No wavy washer
      • Spacers sit between the bottom bracket seals and the crank arm
      • Fits SRAM DUB 29mm spindle cranks
    • The 30mm spindle kit includes:
      • Two .5mm spindle spacer, nylon
      • Three 1mm spindle spacers, aluminum
      • Two 2.5mm spindle spacers, aluminum
      • One 30mm wavy washer, steel
      • Spacers/wavy washer sit between the bottom bracket seals and the crank arm
      • Fits 30mm spindle cranks such as White Industries, etc.

    Technical Documents

     

  • External T47 Bottom Bracket

    External T47 Bottom Bracket

    The White Industries External T47 Bottom Bracket delivers smooth performance, exceptional durability, and long-lasting reliability for today’s road, gravel, and mountain bikes. We machine, polish, engrave, and assemble every bottom bracket in our Petaluma, California facility. As a result, every bottom bracket reflects the precision craftsmanship riders have trusted from White Industries for more than 30 years.

    White Industries helped develop the T47 bottom bracket standard in 2016 to solve common frame design challenges while improving serviceability. The larger threaded shell provides more room for oversized frame tubes and allows space for internally routed cables and wires. At the same time, it retains the simplicity and reliability of a threaded bottom bracket.

    Every External T47 Bottom Bracket features premium Enduro bearings for smooth, efficient performance and long service life. Choose between durable Enduro stainless steel angular contact bearings or upgrade to Enduro XD-15 ceramic-hybrid radial bearings for even greater performance and corrosion resistance.

    We offer three bearing sizes to ensure compatibility with a wide range of cranksets. Whether you’re running a White Industries crank or another manufacturer’s crankset, there’s an External T47 Bottom Bracket designed to fit your build.

    The External T47 Bottom Bracket is designed for 68mm and 73mm wide T47 threaded bottom bracket shells. Its bearings sit outside the frame shell, providing additional spindle clearance for compatible cranksets. If your frame uses an 86mm or 92mm wide T47 shell, you’ll need one of our Internal T47 Bottom Brackets instead.

    Because bottom bracket standards vary between frame and crank manufacturers, we recommend confirming your frame’s shell width and your crank spindle diameter before ordering. This ensures the correct fit and years of smooth, trouble-free performance.

    Whether you’re upgrading your drivetrain or building a custom bike from the ground up, the White Industries External T47 Bottom Bracket delivers the precision, durability, and American-made quality your bike deserves.

    Features

    • Precision CNC-machined in Petaluma, California
    • Designed for 68mm and 73mm T47 threaded bottom bracket shells
    • Available with Enduro stainless steel angular contact bearings
    • Optional Enduro XD-15 ceramic-hybrid radial bearings
    • Three bearing sizes available for broad crank compatibility
    • Threaded design for simple installation and reliable performance
    • Precision machine-engraved White Industries logos
    • Durable, fully serviceable construction
    • Made in the USA
  • 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.