CeramicSpeed OHD Headset Kit

It means you can stop using grease. The bearings use an oil-encapsulated polymer that releases lubricant as the bearing rotates, so you don't need to manually clean or re-grease them, even after riding in wet or muddy conditions.

This specific OHD kit is engineered exclusively for the Specialized Aethos. It uses the IS42/30 and IS52/40 S.H.I.S. standards, so you must verify your frame's headset specifications before purchasing.

Because the solid polymer prevents contaminants from entering the bearing raceways and eliminates the need for grease that can wash away, it is significantly more resistant to corrosion and wear than traditional open-bearing systems.

Not at all. The system is designed to provide the same smooth, precise steering feel as a high-end traditional bearing, but with the added benefit of consistent performance that doesn't degrade as the lubricant ages.

CeramicSpeed backs this kit with a lifetime warranty. If you encounter issues with the bearings under normal riding conditions, you are covered for the life of the product.