CeramicSpeed cartridge bearings with coated race are a premium upgrade option that provide extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings. These bearings feature coated races that provide the ultimate performance and longevity.

• Grade 3 Silicon Nitride balls
• The coated bearing races increase the bearing service life by providing extreme hardness to the race and reducing corrosion
• Reinforced polymide cage and non-contact seal to keep dirt and moisture out
• High resistance to poor lubrication
• Can be used for any cycling discipline
• Sold as each
• Hand built in Denmark
• Limited Lifetime Warranty

Specifications:

• Bearing I.D. (mm): 17
• Manufacturer Number: 61903 (6903) coated
• Bearing O.D. (mm): 30
• Material: Ceramic
• Thickness: 7