Premium 40-Series Cartridge Bearings for Smooth Headset Performance

Upgrade your bike’s headset with these high-performance 40-Series cartridge bearings, engineered for durability and precision. Featuring a rugged black oxide finish, these bearings resist corrosion and wear, ensuring long-lasting smooth rotation for road bikes, mountain bikes, and commuter builds.

Key Features:

✔ Universal Compatibility – Fits 110-, 40-, and 10-Series headsets for versatile use
✔ Precision Dimensions – 52mm outer diameter, 42mm inner diameter, and 7mm thickness for seamless integration
✔ 45×45° Angular Contact – Optimized for reduced friction and improved load distribution
✔ Maintenance-Free Design – Sealed cartridge construction keeps dirt out and lubrication in

Why Choose These Bearings?

Ideal for cyclists seeking low-maintenance, high-performance replacements, these bearings eliminate play and chatter for a quieter, more responsive ride. Whether you’re tackling rough trails or cruising city streets, they deliver consistent performance without frequent adjustments.

Perfect For:
– DIY bike builders upgrading headset components
– Riders replacing worn or gritty OEM bearings
– Enthusiasts prioritizing durability over standard loose-ball setups

Specs at a Glance:
| Feature | Detail | Advantage |
|——————|———————-|————————————|
| Material | Black oxide steel | Corrosion-resistant, extended life |
| Bearing Type | Sealed cartridge | No maintenance, better dust proofing |
| Angle | 45×45° | Smoother rotation under load |

Swap out old bearings effortlessly and enjoy buttery-smooth steering with every ride.