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Merlin Cycles£24.99Visit shop Shimano Black Sm-Bb71-C Zee Press-Fit Bottom Bracket - / Press Fit
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The Shimano SM-BB71-C Zee Press-Fit Bottom Bracket is an essential component for mountain bikers using Shimano HollowTech II cranksets, specifically engineered for frames featuring 107mm shell widths. It provides a reliable, high-performance interface that minimizes frame noise through its fibre-reinforced polymer construction, though it is exclusively designed for press-fit frames, making it unsuitable for threaded bottom bracket shells.
| Material | Polyester |
|---|---|
| Model Part Number | ISMBB7141C |
| Brand | Shimano |
No, this bottom bracket is specifically designed for Shimano HollowTech II cranksets.
Yes, the kit comes with the left and right cups, the inner cover, and the necessary O-rings.
No, this specific model (SM-BB71-C) is designed for a 107mm shell width.
It is highly recommended to apply a light layer of waterproof grease to the outer surface of the cups to facilitate installation and prevent creaking.
The bearings are factory sealed for a maintenance-free life; they are not intended to be opened for service.
Remove the crank, clean the spindle and bearing contact points, apply fresh grease, and ensure the cups are fully seated in the frame.
Verify the shell diameter is exactly 41mm and ensure you are using a proper press-fit installation tool to apply even pressure.
Installation of the SM-BB71-C requires a dedicated press-fit tool to ensure the cups are seated perfectly parallel within the frame shell. Forcing the cups in without proper alignment tools can damage the frame or the polymer housing. Before installation, ensure your frame shell is clean and free of debris. Apply a light layer of high-quality bike grease to the contact surfaces to aid insertion and prevent future noise.
Compatibility Checklist:
Care is minimal: avoid using high-pressure water spray directly at the crank/bottom bracket interface during bike washing, as this can force water past the seals over time.
