Black bearing bearing headset 40 × 51.8 × 7 mm 45° / 45° HB-D27

BLACKBEARING D27 headset bearing – 40 × 51.8 × 7 mm (45°/45°)

The BLACKBEARING D27 is a high-quality sealed cartridge headset bearing designed for modern bicycle steering systems. It is engineered for smooth steering, low friction, and long-lasting durability under a wide range of riding conditions.

Key features

• High-quality BLACKBEARING headset bearing
• Sealed cartridge construction
• 45°/45° angular contact design
• Low rolling resistance
• Strong protection against dust, mud, and moisture
• Chrome steel races and balls
• Precision-ground surfaces for smooth operation
• Long-lasting grease for extended service life
• Designed for modern integrated headset systems

Technical specifications

Compatibility

• Headset systems requiring a 40 × 51.8 × 7 mm bearing
• 45°/45° angular contact standards
• Specific integrated headset systems only
• Always verify exact dimensions and angles before installation, as headset bearings are not universally interchangeable

In practice

• Ideal replacement for worn or damaged headset bearings
• Provides smooth and precise steering response
• Sealed design protects against contamination
• Durable construction ensures long service life
• Suitable for road, gravel, MTB, and e-bike use