Zero Bearing 27.15x38x6.5mm 36/45
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Zero Bearing 27.15 × 38 × 6.5mm 36°/45°
What Is It?
The Zero Bearing 27.15 × 38 × 6.5mm 36°/45° is a sealed cartridge headset bearing used in bicycle steering systems. It sits inside the headset and allows the fork steerer tube to rotate smoothly while handling rider weight, braking forces, and impact loads from the front wheel.
This specific size is typically used in integrated headset systems (often upper or lower bearings depending on frame design), especially on road, gravel, and some MTB frames.
Key Features
- Precision sealed cartridge bearing for bicycle headsets
- Angular contact design: 36° upper / 45° lower contact angle
- Smooth, low-friction steering performance
- Fully sealed to resist water, dust, and mud ingress
- Durable steel construction for long service life
- Direct replacement bearing for compatible headset systems
- Helps eliminate headset play and rough steering feel
- Designed for integrated and semi-integrated headsets
Specifications
- Model: Zero Bearing (generic OEM reference)
- Dimensions: 27.15mm × 38mm × 6.5mm
- Contact Angles: 36° / 45°
- Type: Sealed cartridge headset bearing
- Application: Bicycle headset (upper or lower depending on frame)
- Material: Hardened steel races and balls
- Seal Type: Integrated dust/water seals
- Compatibility: Frames requiring 27.15 × 38 × 6.5mm 36/45 bearings
Who Is It Suitable For?
- Road cyclists servicing integrated headsets
- Gravel riders maintaining steering systems
- MTB XC riders replacing worn headset bearings
- Bike mechanics performing headset overhauls
- Riders experiencing:
- stiff or notchy steering
- headset play or looseness
- corrosion or bearing noise
Who Should Use It?
- Cyclists replacing worn or seized headset bearings
- Riders rebuilding or servicing headset assemblies
- Bike builders working with frames specifying this exact size
- Anyone needing to restore smooth steering performance
- Workshop technicians handling routine bike maintenance
Important Fitment Note
This bearing must match both size and contact angle:
- 36°/45° bearings are not interchangeable with 45°/45° systems
- Incorrect angle fitment can cause:
- premature wear
- headset looseness
- poor steering precision.
