Wheels Manufacturing Loose Ball Bearings

Loose ball bearings are not universal, so you must verify the size before ordering. The best method is to measure your existing bearings with a digital caliper or consult the technical documentation for your specific hub model.

Grade 25 refers to the precision and roundness of the ball bearing. It is a high-quality standard suitable for performance components like Shimano Dura-Ace or Campagnolo Record, ensuring smoother rotation and less friction than lower-grade alternatives.

While these are high-quality steel bearings, they are sized specifically for hub assemblies. Headsets and bottom brackets often require different sizes or specific retainer cages, so you should confirm the exact diameter and type required by your component before attempting to use these.

Yes, you should use a high-quality bicycle-specific waterproof grease when installing new bearings. This helps hold the loose balls in place during assembly and provides essential lubrication and protection against corrosion.

No, you should always replace the entire set of bearings at once. Mixing new, perfectly round bearings with worn ones will cause uneven wear and poor performance, effectively negating the benefit of installing new parts.