Enduro Standard Design Cartridge Bearings.

• 90% filled with Mobilux NGLI 2 synthetic grease, dual-lip labyrinth seals
• If the bearing you are replacing is not marked with a manufacturer number, measure it and compare to specifications listed
• Thickness: 7
• Material: Steel
• Bearing O.D. (mm): 30
• Manufacturer Number: 6903
• Bearing I.D. (mm): 17