6903-2RS Stainless Steel Ceramic Hybrid Radial Bearing, 17x30x7mm Bicycle Hub Front Rear Hubs Wheel Bearing (1PC)

Hubs Bearing GuideThe hub is the central part of your bike's wheels (front and rear), which connects to the wheel's rim via the spokes and through which the axle is fitted, enabling the wheel to freely spin on two sets of bearings.Your wheels spin more than any other part of your bike. Therefore, having the best bearings in this application is crucial to producing the best results.Bearing Detail：Item: SC6903-2RSClosures: 2RS SealedStructure: Ceramic Ball BearingDimensions: 17 x 30 x 7mmID (inner diameter): 17 mmOD (outer diameter):30 mmWidth: 7 mmPackage include:1 x SC6903RS Bearing

• Accurately ground and polished to ABEC-3 Precision Tolerances
• Ceramic Balls roll with less resistance guided by a special retainer.
• PA66 Cage keep them rolling with the least amount of drag or resistance.
• LLB seals keep the dirt out and the Germany Klueber NB52 Grease inside with the V-Groove Sealed design.
• Runs fast with ultimate protection for long runs in between service. Upgrade your bike with something you can actually feel makes you go faster.