Sealed Ball Bearing 17x28x7 mm With Si3N4 Ceramic Balls Chrome Steel Races For Bicycle Use Model 17287-2RS Rubber Seals Dust Protection And Smooth Low Friction Rotation

Ceramic Si3N4 Bearing for Bike Components and Seals
✔️ 17x28x7 mm sealed ceramic bearing with Si3N4 balls, single unit

This sealed ball bearing uses silicon nitride ceramic balls and chrome steel races, designed for bicycles where lightweight and low-friction components help improve efficiency and longevity. It comes pre-lubricated and dust-sealed to withstand outdoor riding conditions.

✅ Dimensions: 17 mm ID x 28 mm OD x 7 mm width
✅ Balls: Silicon Nitride (Si3N4) ceramic
✅ Races: Chrome steel inner and outer rings
✅ Seal: Non-contact rubber seal for dust protection
✅ Lubrication: Pre-lubricated with Kluber NB52 grease

💡 What is a sealed ceramic bearing used for in bicycle components?

This handy bearing is designed to reduce friction and extend service life in bike hubs, bottom brackets, and wheel axles. - High load capacity with ceramic balls - Low friction and long service life - Sealed design keeps out dirt and grease retention - Compatible with standard 17x28x7 sizes