Information
Product Details
White Industries internal 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 “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.
Specs
- 47mm x 1mm threads (“T47” threads)
- Designed to be used on 86mm or 92mm wide bottom bracket shells
- Not compatible with 68mm or 73mm wide BB shells
- Enduro stainless steel angular contact bearings
- Enduro XD15 ceramic-hybrid bearings optional
- Weight/pr (with bearings and seals)
- 30mm: 79g
- 29mm: 87g
- 24mm: 98g
- Cup widths (external section of each cup, including seal)
-
- 24mm: 2mm
- 29mm: 2mm
- 30mm: 2mm
-
- Thread depths
- 24mm: 13.4mm
- 29mm: 13.4mm
- 30mm: 13.4mm
- Bearings
- 24mm: Enduro SMRA 2437 LLB or CXD MR 2437 LLB
- 29mm: Enduro S71806/29 LLB or CXD 6806/29 LLB
- 30mm: Enduro S71806 LLB or CXD 6806 LLB
- Torque: 26-37 ft lbs (35-50 Nm)
- Anodized with machine engraved logos
- Available in black only
Compatibility
- Designed to be used on 86mm or 92mm wide bottom bracket shells
- Not compatible with 68mm or 73mm wide BB shells
- Comes in three bearing sizes to fit:
- 30mm White Industries MR30 series cranks as well as other brands of 30mm spindle cranks
- 29mm SRAM DUB cranks as well as other brands of 29mm spindle cranks
- 24mm Shimano HollowTech II road and mountain cranks as well as other brands of 24mm spindle cranks
- Not compatible with square taper style spindles
- Compatible with White Industries T47 BB sleeve available separately under Cranks>Bottom Bracket Sleeves
- Tools: see the Bottom Bracket Tool Compatibility document
How many spacers?
White Industries cranks
- No spacers needed with White Industries R30 and G30 cranks on 86mm shells
- 92mm shells are too wide to use with these models
- No spacers needed with White Industries M30 and A30 cranks on 92mm shells
- On 86mm shells, use one 2.5mm BSA cup spacer or one 2.5mm x 30mm spindle spacer on each side
For other manufacturers’ cranks it’s very hard to estimate exactly how many spacers you might need. Most cranks these days have an adjustable bearing preload collar on them that can accommodate slightly wider/narrower “Outer Bearing Width” (OBW) than their target number, but you’ll need to check with your particular crank’s manufacturer. When in doubt, start with few spacers than you think you need so you don’t crush and destroy your bearings!
29mm SRAM DUB cranks
- SRAM DUB 29mm spacers are not compatible with our BSA 29mm bottom bracket
- Spacer kits available under Parts>Bottom Bracket Parts>Bottom Bracket Spindle Spacer Kits
- Using SRAM’s charts, look at the BSA row, find your shell width, find your crank model, then see what spacers they require
- Our cups are .5mm wider (each) than SRAM DUB cups so take this into account when estimating spacers
24mm Shimano HollowTech II cranks
- Our cups are the same width as Shimano mountain BB cups (10.5mm each)
- Our cups are 1mm narrower (each) than Shimano road BB cups
- In either case you will normally not need spacers
What’s In The Box
- Left and right threaded T47 internal cups with bearings installed and two external seals
- Seals should sit directly against the bearings, with the part numbers (molded into the seal) facing out
- Cup or spindle spacers not included
- Sleeve not included
- White Industries T47 BB sleeve available separately under Cranks>Bottom Bracket Sleeves
