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White Industries Bottom Bracket Model: BSA External

  • Bottom Bracket Bearings

    Bottom Bracket Bearings

    Product Details

    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 Seals

    Bottom Bracket Seals

    Product Details

    Bottom bracket seals are specific to the spindle size of your bottom bracket, not the “style” of bottom bracket (i.e., BSA, PF30, T47 etc.).  The seals should sit directly against the bearings, with the part numbers (molded into the seal) facing out.  Any spindle spacers used should sit on the outer side of the seal, between the seal and crank arm.

    Specs

    • Sold individually
    • Available for the following spindle/bearing sizes
      • 24mm (Shimano, Etc.)
        • 24mm ID x 37mm OD x 1.5mm wide
      • 29mm (SRAM DUB)
        • 29mm ID x 42mm OD x 1.5mm wide
      • 30mm (White Industries, Etc.)
        • 30mm ID x 42mm OD x 1.5mm wide

     

  • 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