Bottom bracket Shimano Ultegra BB-BB72-41 BB86 — press-fit, for BB86 frame shells

Shimano Ultegra BB-BB72-41 is a press-fit bottom bracket engineered for frames with BB86 shell specifications. It provides a precision-fit interface for Hollowtech II cranksets, delivering low-friction bearing rotation and stable support for road cycling. Designed to fit BB86 press-fit shells, this bottom bracket helps maintain correct spindle alignment and bearing preload for everyday training and competitive riding.

Advantages

The press-fit design simplifies installation in compatible BB86 shell frames and eliminates the need for threaded cups. High-quality sealed bearings reduce friction and resist ingress of dirt and moisture, extending service intervals. The unit is manufactured to tight tolerances to ensure accurate crank spindle alignment and consistent pedaling feel across a range of riding conditions.

Suitable for

• Road bikes with BB86 press-fit bottom bracket shells
• Hollowtech II cranksets and compatible 24 mm spindle systems
• Everyday training, long-distance rides and competitive road racing

Key specifications

• Compatibility: BB86 press-fit frame shells
• Crank interface: for 24 mm spindle Hollowtech II-style cranksets
• Bearing type: sealed cartridge bearings for reduced maintenance
• Intended use: road cycling (training and racing)
• Mounting: press-fit installation into frame shell

How to use

Prepare the BB86 shell by cleaning and inspecting the frame faces for flatness and correct width. Grease the contact surfaces and press the bottom bracket cups into the shell using an appropriate press tool, ensuring even, parallel insertion. Install the compatible Hollowtech II crankset according to the crank manufacturer's instructions, check bearing preload where applicable, and verify smooth rotation and absence of play before riding.

Usage recommendations

Regularly inspect for noise, play, or roughness in the bearings and re-grease contact interfaces as recommended by the frame and component manufacturers. Use the correct press tool to avoid frame or cup damage, and follow torque and installation guidance for the crankset to ensure reliable operation.