Information

Product Details

This bottom bracket is designed for 30mm spindle cranks installed into press fit style BB86 and BB92 bottom bracket shells that have an internal diameter of 41mm. It uses 30mm ID bearings to work with our MR30 series cranks as well as many other manufacturers that use 30mm spindles.  This unique design utilizes Enduro stainless steel double row flanged bearings that press directly into the BB shell.  This allows more room for bigger diameter balls as well as doubling the number of balls per side, both of which greatly increase the durability and life of the bearings.

Specs

• 41mm O.D. for “press-fit” into 41mm I.D. “PF86” and “PF92” bottom bracket shells
• Designed to be used on 86mm or 92mm wide bottom bracket shells
• Bearings
  • Enduro stainless steel double row
• Weight/pr
  • 73g
• Cup width (each)
  • 30mm: 1.5mm
• Cup lip
  • 1.5mm
• Min bore depth needed
  • 10mm

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!

What’s In The Box

• Left and right (identical) PF86/92 cups/bearings
• Includes (2x) 1mm x 30mm spindle spacers
• No sleeve included or available for this model

Technical Documents

• MR30 Crank and Bottom Bracket Compatibility Chart
• MR30 Crank Assembly