Bottom bracket removal tool Shimano with TL-UN74-S cartridges - Y13009073

Shimano ’s TL-UN74-S tool (part no. Y13009073) is an essential professional spanner for removing and fitting cartridge bottom brackets Shimano. Designed for square-axle and Octalink systems, it ensures precise, safe work without damaging the frame or the bottom bracket shell.

Made from high-strength hardened steel, this tool ensures excellent durability even with intensive use in a bike workshop or for regular maintenance at home. Compact, reliable and perfectly matched to the Shimano sockets, it is an essential tool for mechanics and keen cyclists alike.

Key features of the Shimano TL-UN74-S:

• Compatible with Shimano square-axle and Octalink cartridge bottom brackets
• 20-tooth profile for precise grip without slipping
• Made from ultra-strong hardened steel
• Easy to use with a 32 mm open-ended spanner
• Ideal for safe fitting and removal
• Official Shimano tool: ref. Y13009073

Main compatibilities:

The TL-UN74-S tool is compatible with many Shimano gearboxes, including:

• BB-UN series
• BB-ES series
• Older Dura-Ace / Ultegra models (e.g. 7700, 7703)
• Older generations of Deore / XT
• BB-M952 and variants

It is particularly suitable for cartridge bottom brackets Shimano ) with a standard 20-spline profile.

Use and operation

The Shimano TL-UN74-S is used in conjunction with a 32 mm spanner or an adjustable spanner.

It allows:

• Removing seized or old bottom bracket housings
• Precise fitting without damaging the frame’s threads
• Efficient transmission of tightening torque
• Clean work on road bikes, mountain bikes and touring bikes

Its compact design allows you to work even in hard-to-reach areas around the bottom bracket.

FAQ – Shimano TL-UN74-S Y13009073:

What is this tool used for?

It is used to fit and remove Shimano cartridge bottom brackets (square taper and Octalink).

Is it compatible with all bikes?

No, it is designed for Shimano 20-spline bottom brackets. It is not suitable for modern press-fit or non-cartridge BSA systems.

What type of spanner should be used?

A 32 mm flat-rate spanner or adjustable spanner is required to operate the tool.

Can it be used for amateur purposes?

Yes, it is perfectly suited to private individuals who service their own bikes, as well as professional workshops.

Is it a durable tool?

Yes, as it is made from hardened steel, it offers excellent resistance to wear and tear and high clamping forces.

How does it differ from other ‘ Shimano ’ tools?

The TL-UN74-S is a compact and economical version of the TL-UN66, whilst retaining excellent rigidity.