Shimano Ultegra BB72-41B Press-Fit Bottom Bracket

Shimano Ultegra BB72-41B Press-Fit Bottom Bracket Shimano

Shimano Ultegra BB72-41B Press-Fit Bottom Bracket

Shimano Ultegra BB72-41B Press-Fit Bottom Bracket

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What Frames Use the Shimano Ultegra BB72-41B Press Fit Bottom Bracket?

The Shimano SM-BB72-41B is the Ultegra-tier press-fit bottom bracket for road frames with 86.5mm BB86 or BB92 shell widths, built on the Hollowtech II outboard bearing platform that Shimano uses across its road crankset lineup. Reliable Shimano bearings and seals deliver the long service life Ultegra is known for, providing consistent, smooth rotation over thousands of miles. The press-fit design allows frame manufacturers to engineer wider chainstay clearance and more aerodynamic tube shapes without the thread limitations of traditional threaded shells, making BB86/BB92 frames common across the carbon road market.

Designed for 86.5mm press-fit shell widths and compatible with Shimano Ultegra R8000 and R8100 cranksets using the 24mm Hollowtech II axle, and broadly compatible with other Shimano road Hollowtech II cranksets on the same shell specification. Installation requires a press-fit bottom bracket installation tool. Shimano also makes the SM-BBR60 threaded bottom bracket for Ultegra builds on standard threaded frames. For Ultegra riders with a press-fit frame, the SM-BB72-41B is the correct OEM bottom bracket to specify.

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Specifications

  • Model: SM-BB72-41B
  • Series: Shimano Ultegra
  • Interface: Hollowtech II (24mm axle), press-fit
  • Shell Width: 86.5mm (BB86/BB92)
  • Bearing Type: Outboard sealed, Ultegra-grade
  • Compatible Cranks: Shimano Ultegra R8000, R8100 and compatible road Hollowtech II cranksets

FAQ

What is the difference between the BB72-41B and the BB92-41B?

The SM-BB72-41B is the Ultegra-spec press-fit BB, while the SM-BB92-41B is the Dura-Ace version with advanced seal construction and a lower weight of 54g. Both use 86.5mm shell width and the same Hollowtech II 24mm interface. The Dura-Ace version is functionally interchangeable in any frame that takes the 86.5mm press-fit spec.

Can this be used with GRX or 105 Di2 cranksets?

Yes. Shimano road Hollowtech II cranksets all use the same 24mm axle interface. The SM-BB72-41B is compatible with GRX, 105, Ultegra, and Dura-Ace cranksets on frames with 86.5mm press-fit shell widths.

What tool do I need to install a press-fit bottom bracket?

A dedicated press-fit BB installation tool is required, such as the Park Tool BBP-1 or Wheels Manufacturing press. Using a hammer directly is not recommended as it can crack the bearing cups or damage the frame shell.

Best For

Road cyclists with BB86/BB92 press-fit frames running Shimano Ultegra or compatible road Hollowtech II cranksets who need a reliable long-service-life OEM bottom bracket.

Shimano Ultegra BB72-41B Press-Fit Bottom Bracket Reviews:

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