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(10PCS) Bicycle Hybrid Ceramic Ball Bearing 18307 2RS CB Bicycle-specific 18x30x7mm Bicycle Hub Bearing Si3N4 Ceramic ABEC-9
(10PCS) Bicycle Hybrid Ceramic Ball Bearing 18307 2RS CB Bicycle-specific 18x30x7mm Bicycle Hub Bearing Si3N4 Ceramic ABEC-9
Preço normal
$46.43 USD
Preço normal
$0.00 USD
Preço promocional
$46.43 USD
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Specifications:
Item: 18307RS CB
Structure: Deep Groove
Material: Bearing Steel Hybrid Ceramic Si3N4
Bore Dia (d): 18 mm
Outer Dia (D): 30 mm
Width (B): 7 mm
Closures: Metal Seal
Magnetic: little
Hardness: 58HRC
Corrosion Resistance: General
Clearance: C0
Grades: ABEC-7
Features:
Crafted for cyclists who conquer relentless distances and punishing terrain, this bicycle-specific hybrid ceramic bearing redefines rotational efficiency where ordinary components falter. Engineered as the ultimate solution for high-stress hub environments, it transforms energy-sapping friction into pure, uninterrupted forward motion—delivering race-winning responsiveness and ironclad reliability across alpine passes, gravel sectors, and urban jungles alike.
✅ Dynamic Load Adaptation for Unyielding Power Transfer
Unlike static steel bearings, our aerospace-grade silicon nitride (Si₃N₄) ceramic balls actively respond to shifting forces. Under sudden lateral loads from cornering or rough terrain, the ceramic’s unique elasticity absorbs micro-impacts while maintaining a friction-minimized contact patch with hardened stainless steel races. The result? Zero energy leakage during technical descents or crosswinds—where power stays locked in the drivetrain, not lost to vibration. Ideal for riders demanding stability at speed.
✅ Thermal-Neutral Precision for All-Day Consistency
Engineered with ABEC-9 micro-tolerances and ceramic’s near-zero thermal expansion coefficient, this bearing maintains perfect alignment whether braking through alpine switchbacks or grinding up desert climbs. While steel bearings warp under heat-induced stress, ours stays dimensionally stable—delivering unchanging smoothness from dawn to dusk rides. Feel the difference in reduced hand fatigue and unbroken cadence when others fade.
✅ Self-Cleaning Seal Technology for Extreme Terrain
Our proprietary 2RS dual-seal system doesn’t just block contaminants—it expels them. As the bearing rotates, centrifugal force actively ejects embedded grit and moisture through micro-channels in the rubber lip, preventing abrasive buildup. Combined with stainless steel’s corrosion armor, this means zero performance drop-off in muddy cyclocross races or salted winter roads—where conventional bearings seize within weeks.
✅ Intelligent Integration for Seamless Performance Evolution
Pre-packed with temperature-stable, nano-ceramic grease that thins under load for lower drag yet thickens at rest for storage protection, this bearing adapts to your riding rhythm. Its universal fit requires no tools or recalibration—simply replace worn units and instantly unlock smoother coasting, quieter operation, and measurable watt savings on your existing wheelset. Maintenance becomes a memory, not a chore.
For those who measure success in summits bagged and miles devoured, this bearing isn’t an upgrade—it’s the kinetic insurance policy your endurance ambitions demand.
