Premium Hybrid Ceramic Bicycle Bearings – MR18307 18x30x7mm

High-Performance Hybrid Design
Combines durable steel races with smooth ceramic balls for reduced friction, higher RPM, and extended lifespan under heavy loads.
Precision Engineering
18x30x7mm dimensions with tight tolerances (ABEC-rated) ensure seamless integration into hubs, bottom brackets, and pedals for road/MTB/ebikes.
Superior Corrosion Resistance
Stainless steel shields with 2RS rubber seals protect against dirt, water, and debris—ideal for wet or off-road conditions.
Ultra-Low Maintenance
Self-lubricating grease minimizes wear, offering silky-smooth rotation for thousands of miles without servicing.
Proven Durability
Lab-tested to outperform all-steel bearings in heat dissipation and weight savings (20% lighter).
Bulk Savings
Direct factory pricing for mechanics, distributors, or large-scale bike manufacturers—no minimum order.
Universal Fit
Compatible with Shimano, SRAM, and most 18mm axle systems. Upgrade your drivetrain effortlessly.
Warranty Backed
30-day hassle-free returns + 1-year defect coverage. Trusted by OEM suppliers worldwide.