Bottom-Bracket Tool Retainer, 153A/153B Options

Help keep a matching bottom-bracket socket engaged during suitable service work with a separate retainer. The two versions must be selected around the actual crank/spindle and tool arrangement.

• ✅ Retain the matching socket - the accessory helps keep it aligned with the component.
• ✅ Choose the thread format - M8/M15 references help identify a suitable version.
• ✅ Keep the service tool separate - add the retainer to a compatible existing kit.

Check the Variant Against the Actual Thread

The description identifies an M8-only version and another version with M8/M15 provision. Compare the 153A/153B photographs and dimensions before selection rather than relying on colour alone.

Use the retainer only with compatible threads and tools, following the component's service procedure. It does not replace the bottom-bracket socket, wrench or correct torque method. Bicycle and other tools are not included.

Technical details

• Material: carbon steel.
• Options: BB 153A or BB 153B.
• Thread references: M8 and/or M15, depending on version.
• Package: selected retainer.
• Confirm socket and spindle clearance.

Match the thread and socket before adding the retainer to your service setup.