Description
Upgrade your cycling performance with the CeramicSpeed 61903/18 Standard Bearing – a superior solution engineered for every discipline, from road racing to mountain biking and gravel adventures. Crafted with precision and built to last, this high-performance ceramic bearing is designed to deliver ultra-low friction, enhanced power transfer, and exceptional durability.
Materials & Engineering Excellence:
Constructed with Grade 3 Silicon Nitride ceramic balls, the CeramicSpeed 61903/18 bearing ensures lightweight, hard-wearing performance while significantly reducing rotational resistance. The hardened steel races provide added strength and stability, making these bearings ideal for demanding cycling environments. The reinforced polyamide cage and non-contact seal prevent dirt, moisture, and debris from compromising performance, ensuring a long service life even under harsh conditions.
Performance & Technology:
Featuring advanced ceramic technology, these bearings offer friction levels up to 50% lower than traditional steel bearings. The high resistance to poor lubrication and contamination minimizes maintenance needs and extends service intervals. Perfect for high-speed road cycling, mountain biking, and cyclocross, the CeramicSpeed 61903/18 enhances smoothness, efficiency, and rider confidence.
Style & Use Case:
Designed for versatility across all cycling disciplines, this bearing seamlessly replaces standard components in hubs, cranksets, and bottom brackets. Hand-built in Denmark, each bearing guarantees superior craftsmanship and quality control, making it the ideal upgrade for serious cyclists seeking performance gains and reliable durability.
Innovative Features:
– Precision-grade Silicon Nitride ceramic balls for lightweight strength
– Hardened steel races for durability and stability
– Reinforced polyamide cage and non-contact seal for optimal dirt and moisture exclusion
– Low friction for improved efficiency and power transfer
– Long-lasting service life with minimal maintenance
Specifications:
– I.D. (Inner Diameter): 18mm
– O.D. (Outer Diameter): 30mm
– Thickness: 7mm
– Material: Ceramic
Upgrade your cycling setup with the CeramicSpeed 61903/18 Standard Bearing and experience unparalleled efficiency, smoothness, and longevity. Perfect for riders seeking cutting-edge technology and performance in every ride.
- Enhanced with Grade 3 Silicon Nitride balls for superior rolling efficiency and durability, these CeramicSpeed 61903/18 cartridge bearings deliver exceptional performance in all cycling disciplines.
- Constructed with hardened steel races and a reinforced polyamide cage, these bearings ensure reliable operation while resisting dirt, moisture, and poor lubrication conditions for extended lifespan.
- Designed for low friction and high power transfer, these ceramic bearings significantly improve cycling efficiency and responsiveness, making them ideal for road, mountain, and track cycling.
- Featuring innovative non-contact seals, they keep contaminants out without adding friction, ensuring smooth rotation and reducing maintenance needs on demanding rides.
- Hand assembled in Denmark with precision engineering, the CeramicSpeed 61903/18 bearings provide a lightweight, high-performance upgrade to elevate your bike’s handling and longevity.
| Bearing I.D. (mm) | 18 |
| Bearing O.D. (mm) | 30 |
| Manufacturer Number | 61903/18 |
| Material | Ceramic |
| Thickness | 7 |






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