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Use the MUQZI bottom bracket tool to remove or install a compatible bicycle cup with a matching notch pattern. The tool is made from aluminum alloy and supports workshop service with a 1/2-inch drive ratchet, torque wrench or adjustable wrench.
Match the tool to the bottom bracket cup
Options include BB39-16T, BB40.5-16T, BB44-16T and DUB 12-24T styles, with a set option also available. Before ordering, count the notches and measure the cup’s outer diameter, then select the corresponding tool; the variants differ in fit and must not be treated as interchangeable.
- ✅ Matching the notch pattern helps the tool engage the cup correctly.
- ✅ Aluminum-alloy construction keeps the specified tool material clear.
- ✅ Drive options let you use common workshop wrenches for bicycle maintenance.
Check the selected variant against your cup before purchase. Choose the matching MUQZI tool and add it to your bike repair kit.










Review the product images for additional details before selecting your option.
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