Press Fit 86/92 Bottom Bracket

Compatibility

• Designed to be used on 86mm or 92mm wide bottom bracket shells
• Bearing  fits:
  • 30mm White Industries MR30 series cranks as well as other brands of 30mm spindle cranks
  • Not compatible with square taper style spindles
• No sleeve included or available for this model
• Tools: Bearing press for 30mm bearings
  • Available under Tools>Bearing Presses

How many spacers?

White Industries cranks

• Use 1x 1mm x 30mm spacer (either side) with R30 and G30 cranks on 86mm shells (92mm shells are too wide)
• Use 2x 1mm x 30mm spacers (1 on each side) with M30 and A30 cranks on 92mm shells
  • On 86mm shells, add one 2.5mm spacer on each side for a total of 3.5mm on each side
    • 30mm spacer kits available under Parts>Bottom Bracket Parts>Bottom Bracket Spindle Spacer Kits

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!