FUSHIBEARING 6902-2RS Hybrid Ceramic Radial Bearing 15x28x7mm — Stainless Steel, Double-Sealed for Bicycle Hubs

FUSHIBEARING's 6902-2RS is a 15×28×7mm stainless-steel hybrid radial bearing with ceramic balls and double rubber seals designed for bicycle hub front and rear axle use.

Wheel hubs take the brunt of rotational load on a bike, so choosing a bearing that reduces friction, resists contaminants, and holds tolerance under stress makes a measurable difference in ride feel and durability. The SC6902-2RS combines ceramic rolling elements, a PA66 retainer and LLB rubber seals filled with Germany Klueber NB52 grease to deliver smoother spin and longer service intervals compared with plain steel designs.

How does this bearing improve wheel spin and efficiency?

The ceramic balls in this hybrid bearing have lower surface contact and reduced rolling resistance versus traditional steel spheres, so energy loss at the hub is minimized. Accurately ground races and an ABEC-3 tolerance spec keep rotation true, and the PA66 cage stabilizes the balls to prevent wobble under load.

• Ceramic balls reduce friction and heat build-up
• ABEC-3 grinding for consistent roundness and fit
• PA66 cage maintains spacing to lower drag
• Reduced resistance helps maintain momentum with less effort

Will it handle dirt, water, and regular riding conditions?

The SC6902-2RS uses dual LLB rubber seals to keep contaminants out while retaining Klueber NB52 grease inside the bearing. The sealed design with a V-groove barrier helps prevent grit intrusion and moisture penetration during routine rides or wet conditions.

• 2RS double rubber seals block dust and water ingress
• V-groove seal profile improves environmental resistance
• High-quality grease retained for extended lubrication intervals
• Stainless-steel races add corrosion resistance in varied climates

What are the exact dimensions and compatibility notes?

This single-piece SC6902-2RS bearing measures 15 mm inner diameter, 28 mm outer diameter and 7 mm width—standard sizing for many front and rear bicycle hub applications. Confirm your hub's spec before ordering; the bearing fits hubs designed for 15×28×7mm replacements and is sold individually.

• Inner diameter (ID): 15 mm
• Outer diameter (OD): 28 mm
• Width: 7 mm
• Supplied as 1 x SC6902RS bearing per package

How long will it last and what maintenance is needed?

With quality sealing and Germany Klueber NB52 grease factory-packed, the bearing runs longer between services than unsealed or poorly lubricated units. Expected life depends on riding conditions, load, and care—but proper installation, occasional inspection, and avoiding contaminated press-fitting extend service life.

• Pre-greased for immediate use out of the package
• Inspect seals after heavy rides or exposure to grit
• Avoid hammering directly on the seal during installation
• If serviceable, clean and re-grease using compatible high-performance grease

Who is this for: Cyclists, wheel builders, and mechanics seeking a reliable bearing upgrade for hub performance will appreciate the SC6902-2RS. It’s aimed at riders who want lower rolling resistance without replacing entire hubs, workshop technicians needing a precise 15×28×7mm hybrid bearing as a spare part, and enthusiasts who value sealed, low-drag components that stand up to normal road or trail use.