Description

High-Performance Replacement Cartridge Bearings (40-Series)

Engineered for precision and longevity in demanding applications, these black oxide-coated cartridge bearings deliver superior durability for bicycle headset systems and motorcycle fork assemblies. Designed as direct replacements for aging or damaged components, they ensure seamless integration with:
110-Series mountain bike headsets
40-Series road bike forks
10-Series BMX/urban bike components

Key technical specifications:
🔧 Bearing Geometry: 45° contact angle design (45×45°) optimized for angular load distribution
📏 Dimensional Accuracy:
 • Outer Diameter: 41.8mm ±0.05
 • Inner Diameter: 30.3mm ±0.03
 • Axial Thickness: 7mm uniform profile

Performance Advantages:
1️⃣ Corrosion-resistant black oxide finish withstands moisture exposure in trail riding conditions
2️⃣ Pre-lubricated cartridge design eliminates maintenance needs for up to 500 hours of use
3️⃣ Precision-ground races reduce friction by 22% compared to standard pressed bearings

📊 Competitive Comparison:

Feature Standard Bearings Our 40-Series
Material Chrome steel Black oxide steel
Load Capacity 1,200 lbs 1,800 lbs
Noise Reduction Basic Vibration-dampened design
Warranty Period 6 months 2-year limited warranty

Ideal for:
🚵♂️ Mountain bike trail riders needing reliable headset performance
🛠️ Shop mechanics requiring OEM-spec replacements without premium pricing
🏍️ Motorcycle enthusiasts upgrading fork assemblies

The sealed cartridge construction prevents contamination while maintaining ±0.001mm concentricity during high-speed rotations – critical for maintaining steering accuracy at speeds exceeding 25mph/40kmh. Available in bulk packs of 5 units (MSRP $299) or single-unit replacements (MSRP $79).

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