WHEELS Mfg ZERØ Ceramic Bearing

The main advantage is reduced rotational friction compared to standard steel bearings. By using silicon nitride balls, these bearings offer a smoother feel and potentially better drivetrain efficiency, which is especially noticeable during long rides or high-intensity efforts.

This bearing is specifically designed for BB30 and PF30 bottom bracket standards. It features an inner diameter of 30mm, an outer diameter of 42mm, and a width of 7mm, so you should verify these dimensions against your current setup before purchasing.

The LLB silicone seals are designed to provide a high level of protection against contaminants like dirt, water, and grime. They effectively seal the bearing internals, helping to maintain smooth performance even when you are riding in less-than-ideal weather.

This product is sold as a single bearing unit. It is intended as a direct replacement component for riders who need to service or upgrade their existing BB30 or PF30 bottom bracket system.

Yes, installing bottom bracket bearings typically requires a bearing press tool to ensure they are seated correctly without damaging the races. If you are not comfortable with press-fit maintenance, it is best to have a professional mechanic handle the installation.