Shimano Dura-Ace BB92-41B Press Fit Bottom Bracket

Shimano Dura-Ace BB92-41B Press Fit Bottom Bracket Shimano

Shimano Dura-Ace BB92-41B Press Fit Bottom Bracket

Shimano Dura-Ace BB92-41B Press Fit Bottom Bracket

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Why Does Dura-Ace Need the Shimano BB92-41B Press Fit Bottom Bracket?

The Shimano SM-BB92-41B is the Dura-Ace press-fit bottom bracket for frames with 86.5mm BB86 or BB92 shell widths, pairing Dura-Ace-grade precision with the Hollowtech II outboard bearing system for maximum pedaling stiffness and rotation efficiency. The advanced seal construction delivers smoother rotation than standard road press-fit bottom brackets while keeping the overall weight to just 54 grams, a meaningful achievement for a press-fit unit. The axle is steadily supported by wide-spaced outboard bearings, providing excellent lateral stiffness for efficient power transfer on every sprint, climb, or sustained effort.

Designed for 86.5mm press-fit shell widths (BB86/BB92 standard) used by many carbon road and aero frame designs where manufacturers chose press-fit for the ability to design wider chainstays without a threaded insert. Compatible with Shimano Dura-Ace R9100 and R9200 cranksets using the 24mm Hollowtech II axle standard, and broadly compatible with other Shimano road Hollowtech II cranksets on frames with this shell specification. Installation requires a press-fit bottom bracket tool such as the Park Tool BBP-1 or Wheels Manufacturing BB press. For riders running a press-fit frame with Dura-Ace cranks, the SM-BB92-41B is the correct OEM bottom bracket.

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Specifications

  • Model: SM-BB92-41B (BB92-41B)
  • Series: Shimano Dura-Ace
  • Interface: Hollowtech II (24mm axle), press-fit
  • Shell Width: 86.5mm (BB86/BB92)
  • Weight: 54g
  • Bearing Type: Outboard sealed, advanced seal construction
  • Compatible Cranks: Shimano Dura-Ace R9100, R9200 and compatible road Hollowtech II cranksets

FAQ

How do I know if my frame uses an 86.5mm press-fit shell?

BB86 and BB92 are the two most common press-fit shell widths for road frames -- both measure 86.5mm in shell width. This spec is common on carbon road frames from Trek, Specialized, Giant, Cannondale, and others. Check your frame's BB specification in the owner's manual or on the manufacturer's website.

Can I use the SM-BB92-41B with Ultegra or 105 cranks?

Yes. All Shimano road Hollowtech II cranksets use the same 24mm axle interface, so this Dura-Ace BB is mechanically compatible with Ultegra and 105 road cranksets. The bearing quality is Dura-Ace grade regardless of which crank is installed.

Is the SM-BB92-41B compatible with R9200 Di2 cranks?

Yes. The SM-BB92-41B is listed as compatible with both the R9100 and R9200 Dura-Ace cranksets, which both use the Hollowtech II 24mm axle interface.

Best For

Road cyclists with BB86/BB92 press-fit frames running Shimano Dura-Ace or compatible road Hollowtech II cranksets who want the lightest, most precisely built OEM Shimano press-fit bottom bracket.

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