BCR5 Ultra: Road/Gravel Disc Performance Kit

The Gold Standard of Momentum.

Maximize your mechanical advantage with the BCR5 Ultra. Specifically engineered for high-performance road disc wheel-sets, these aren't just bearings—they are a critical technical upgrade for racers who refuse to leave watts on the table.

Developed through years of experience on the racing circuit, the BCR5 Ultra system is designed to provide near-zero rolling resistance while maintaining the durability required for real-world pavement conditions.

The Technical Advantage

Precision Grade: Certified ABEC 5 tolerances for ultra-low friction and                          maximum rotational consistency.

Material Science: Grade 5 Silicon Nitride (Si3N4) ceramic balls—58% lighter and 40% stronger than high-grade steel.

Road-Specific Sealing: Equipped with non-contact, dual-lip seals designed to keep road grime out without adding mechanical drag.

Elite Lubrication: Pre-lubricated with high-velocity Bala grease, optimized for the high-RPM demands of road racing.

Hub Compatibility

This kit is optimized for premium road/gravel disc hubs, including:

Hunt Limitless/Aerodynamicist (48 Aero / 42 Gravel)

• Front Hub (2): 6802 (15x24x5mm)
• Rear Hub Shell (2): 6802 (15x24x5mm) & 6902 (15x28x7mm)
• SRAM XDR Freehub (2): 15267 (15x26x7mm)

For specific compatibility questions, refer to our Rim Selection Guide.

What’s In The Box

BCR5 Ultra Ceramic Bearings (Full Hub & Free-hub Set)

Bala Ceramica Founder’s Card 

Technical Spec Sheet with validated micron tolerances