The Park Tool BBT-59.3 is a 16-notch bottom bracket tool designed for installing and removing select threaded bottom brackets. It is made for Shimano Ultegra BBR60 and Shimano Deore XT MT-800 cups, providing a precise and stable engagement.
The tool is precision CNC-machined from aluminium, manufactured in-house by Park Tool and anodized so it can be identified at a glance on the workbench. The 16-notch fitting has a major diameter of 41-42 mm and a minor diameter of 39 mm, sized to mate accurately with compatible cups and spread the force across all notches. A tool that engages all 16 notches reduces the risk of damaging the cup fittings, a common problem with generic or worn tools. Force is applied through the 3/8" square drive, which works with ratchets and torque wrenches, so the bottom bracket can be tightened to the correct torque instead of by feel.
Where to use the Park Tool BBT-59.3 bottom bracket tool
- Installing and removing Shimano Ultegra BBR60 threaded cups
- Installing and removing Shimano Deore XT MT-800 threaded cups
- Controlled tightening with a torque wrench thanks to the 3/8" drive
- Working on shallow cup fittings together with the BBT-RS retaining system (sold separately)
Why choose the Park Tool BBT-59.3
- Precision CNC-machined aluminium, made directly by Park Tool
- Anodized finish that makes the tool easy to identify among other bottom bracket tools
- Integrated threads for the BBT-RS retaining system, whose adjustable spring tension keeps the tool fully engaged in the notches and prevents slipping
- 3/8" drive compatible with ratchets and torque wrenches for repeatable tightening
- Optional GPS-24 24 mm guide pin, sold separately
Important: the tool is not designed for use with impact drivers or other power tools and must be used by hand, with a ratchet or torque wrench. For anyone working on Ultegra BBR60 and XT MT-800, the Park Tool BBT-59.3 bottom bracket tool is the dedicated tool to keep within reach in the workshop.
TECHNICAL SPECIFICATIONS
General
- Code: BBT-59.3
- Type: 16-notch bottom bracket tool
- Drive: 3/8" square for ratchet and torque wrench
- Use: hand use only, not suitable for impact drivers or power tools
Dimensions
- Number of notches: 16
- Major diameter (outside of notches): 41-42 mm
- Minor diameter (inside of notches): 39 mm
Materials
- Material: CNC-machined aluminium
- Finish: anodized
Compatibility
- Bottom brackets: Shimano Ultegra BBR60, Shimano Deore XT MT-800
- Bottom bracket type: threaded
- Compatible accessories: BBT-RS, GPS-24 (sold separately)
The Park Tool BBT-59.3 is a 16-notch bottom bracket tool designed for installing and removing select threaded bottom brackets. It is made for Shimano Ultegra BBR60 and Shimano Deore XT MT-800 cups, providing a precise and stable engagement.
The tool is precision CNC-machined from aluminium, manufactured in-house by Park Tool and anodized so it can be identified at a glance on the workbench. The 16-notch fitting has a major diameter of 41-42 mm and a minor diameter of 39 mm, sized to mate accurately with compatible cups and spread the force across all notches. A tool that engages all 16 notches reduces the risk of damaging the cup fittings, a common problem with generic or worn tools. Force is applied through the 3/8" square drive, which works with ratchets and torque wrenches, so the bottom bracket can be tightened to the correct torque instead of by feel.
Where to use the Park Tool BBT-59.3 bottom bracket tool
- Installing and removing Shimano Ultegra BBR60 threaded cups
- Installing and removing Shimano Deore XT MT-800 threaded cups
- Controlled tightening with a torque wrench thanks to the 3/8" drive
- Working on shallow cup fittings together with the BBT-RS retaining system (sold separately)
Why choose the Park Tool BBT-59.3
- Precision CNC-machined aluminium, made directly by Park Tool
- Anodized finish that makes the tool easy to identify among other bottom bracket tools
- Integrated threads for the BBT-RS retaining system, whose adjustable spring tension keeps the tool fully engaged in the notches and prevents slipping
- 3/8" drive compatible with ratchets and torque wrenches for repeatable tightening
- Optional GPS-24 24 mm guide pin, sold separately
Important: the tool is not designed for use with impact drivers or other power tools and must be used by hand, with a ratchet or torque wrench. For anyone working on Ultegra BBR60 and XT MT-800, the Park Tool BBT-59.3 bottom bracket tool is the dedicated tool to keep within reach in the workshop.
TECHNICAL SPECIFICATIONS
General
- Code: BBT-59.3
- Type: 16-notch bottom bracket tool
- Drive: 3/8" square for ratchet and torque wrench
- Use: hand use only, not suitable for impact drivers or power tools
Dimensions
- Number of notches: 16
- Major diameter (outside of notches): 41-42 mm
- Minor diameter (inside of notches): 39 mm
Materials
- Material: CNC-machined aluminium
- Finish: anodized
Compatibility
- Bottom brackets: Shimano Ultegra BBR60, Shimano Deore XT MT-800
- Bottom bracket type: threaded
- Compatible accessories: BBT-RS, GPS-24 (sold separately)
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