Black bearing bearing headset 40 × 51 × 6.5 mm 36° / 36° mm HB-D11

BLACKBEARING D11 S headset bearing – 40 × 51 × 6.5 mm (36°/36°)

The BLACKBEARING D11 S is a high-quality sealed cartridge headset bearing designed specifically for bicycle applications. Precision manufacturing, stainless steel construction, and an advanced sealing system provide smooth steering performance, excellent corrosion resistance, and long service life, even in demanding conditions.

Key features

• High-quality BLACKBEARING headset bearing
• Sealed cartridge bearing design
• 36°/36° angular contact configuration
• Low rolling resistance
• High protection against dust, mud, and moisture
• Stainless steel construction
• Double-lip 2RS labyrinth sealing system
• Precision-ground bearing races for smoother operation
• Premium-quality lubricant for extended service life
• Metal cage construction for reliable ball retention
• Optimized for bicycle headset systems

Technical specifications

Compatibility

• Suitable for headset systems requiring a 40 × 51 × 6.5 mm bearing
• 36°/36° angular contact design
• Designed for 1.5" steerer tube systems
• Commonly used in selected integrated headset applications
• Always verify dimensions and contact angles before installation, as 36°/36°, 36°/45°, and 45°/45° bearings are not interchangeable.

In practice

• Ideal replacement for worn or damaged headset bearings
• Provides smooth and precise steering performance
• Stainless steel construction offers excellent corrosion resistance
• The double-lip sealing system effectively protects against water, dirt, and dust
• Precision manufacturing and premium materials ensure long service life and reliable performance in road, gravel, MTB, and e-bike applications.