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Merlin Cycles£69.95Visit shop Praxis Black Bb30 Bottom Bracket Conversion - / Bb30 / Pf30 / 68Mm Sram/Gxp
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The Praxis Works Conversion Bottom Bracket is designed for mountain bike cyclists who need to install Shimano 24mm Hollowtech II cranks into BB30, PF30, or Specialized OSBB frames. It offers a stiff, reliable, and creak-free interface between your crankset and frame, though it requires specific tools for installation and careful attention to the plastic sleeve configuration based on your bottom bracket shell type.
| Model Part Number | PR-73-3001R |
|---|---|
| Brand | Praxis |
No, this specific model is designed for Shimano 24mm Hollowtech II cranks. For GXP compatibility, please look for the Praxis GXP variant.
Yes, you will need a standard bottom bracket press tool and possibly a specific wrench interface provided by Praxis to tighten the cups together.
This particular unit is optimized for 73mm shell widths, which is standard for mountain bikes. Please check your frame's bottom bracket shell width before purchasing.
It depends on your frame. It is mandatory for PF30 frames to ensure a proper fit, but must be removed for BB30 frames.
While the bearings are sealed, if they become gritty, it may be necessary to have them serviced or the unit replaced depending on the extent of the contamination.
Ensure the bottom bracket cups are fully tightened together to the manufacturer's torque specification and that the press-fit interface is clean.
Verify that no extra spacers are being used and that the crank arm is not being over-compressed against the bearings during installation.
Confirm that you are using the correct configuration for your frame type (remove sleeve for BB30, keep sleeve for PF30) and that the frame shell is not damaged or oversized.
Proper installation is critical for the long-term performance of this conversion kit. For BB30 frames, the plastic sleeve should be removed before pressing the unit into place. For PF30 frames, the plastic sleeve must be included to ensure the correct diameter and fit within the shell. Use a high-quality press tool to seat the bearings evenly to avoid damage to the shell or the bottom bracket cups. During routine bike maintenance, periodically check the bearing seals for debris and ensure the crank bolts remain torqued to manufacturer specifications. Avoid using harsh degreasers directly on the bearing seals to prevent grease wash-out.
