This is less common hub bearing that fits some DT Swiss, Bontrager and Giant branded hubs that specify "6903" bearing. Please note the OD of this bearing is 1mm larger than standard 6903, so please measure before ordering!

ABEC-3

• Grade 10 steel balls rated at ABEC 3 precision
• Dual-lip labyrinth seals keep dirt out and grease in, even under extreme conditions
• Packed from the factory with the highest quality Rock ‘N’ Roll grease

ABEC-5:

• Grade 5 steel balls rated at ABEC-5 precision
• Retainers are nylon with graphite
• Snap ring seals
• Enduro’s highest quality steel bearing