Presenting the SPARE - Conv BB O-Ring by the industry-renowned brand, Praxis Works. This high-quality bike accessory is designed to maintain and enhance the functionality of your bike's bottom bracket.

The Shimano Hollowtech II converter included with this o-ring product is specifically engineered to provide a proper bottom bracket BB for installing Shimano Hollowtech II cranks in a multitude of frames, bulletproofing its utility across various bike models. This converter's patent-pending design ensures the cartridge bearings sit outboard of the frame right on Shimano spec, thereby maximising rigidity and eliminating frame/c-clip tolerance issues commonly encountered with other conversion bb systems.

The installation process is painless: insert the lengthier non-drive-cup first, and then thread the shorter drive cup into it. As the drive cup threads in, the trademark Collet system of Praxis expands to a precise limit, providing an evenly dispersed pressure for a robust and secure fit. Once both cups are connected and the collet is set to specification, there's no chance of the bearings getting out of alignment or wiggling out of the frame.

Moreover, this robust bottom bracket converter employs a compressible o-ring on the non-drive side cup to compensate for any discrepancies in frame shell width. This ensures an unmatched level of fit and performance, irrespective of the specific features of your bike model.

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