6903-2RS Ceramic Ball Bearing, Stainless Steel with Ceramic Balls, 17x30x7mm, ABEC-3, Double Rubber Sealed, for Bicycle Hub Front Rear Wheel

Elevate your bicycle's performance with these premium 6903-2RS bearings featuring hybrid construction that combines stainless steel races with ceramic balls. These precision bearings are engineered to ABEC-3 specifications, delivering consistent and smooth rotation while minimizing friction. With dimensions of 17x30x7mm, they're perfectly sized for both front and rear bicycle hub applications. The double rubber seal (2RS) design provides superior protection against dust and moisture intrusion, while the stainless steel construction offers excellent corrosion resistance for lasting durability. These bearings are manufactured to exacting standards, ensuring reliable performance in various riding conditions. The ceramic ball design helps reduce rolling resistance and operating temperatures compared to traditional all-steel bearings. Whether you're upgrading your current bike's bearings or building a custom wheel set, these bearings deliver the precision and durability needed for optimal wheel performance.

• HYBRID CERAMIC CONSTRUCTION: Features stainless steel races combined with high-performance ceramic balls that reduce friction and provide smoother rotation for enhanced bicycle performance
• PRECISION ABEC-3 RATING: Engineered to ABEC-3 tolerance standards ensuring consistent, reliable rotation for front and rear bicycle hub applications
• DOUBLE SEALED PROTECTION: Equipped with 2RS rubber seals on both sides that effectively guard against dust, dirt, and moisture contamination for extended bearing life
• CORROSION-RESISTANT DESIGN: Constructed from durable stainless steel material that resists rust and corrosion, making it ideal for various riding conditions and weather exposure
• STANDARD HUB DIMENSIONS: Measures 17mm inner diameter x 30mm outer diameter x 7mm width (0.67 x 1.18 x 0.28 inches), providing universal compatibility with most bicycle wheel hubs