The Enduro Stainless Steel Angular Contact Bearing is the definitive choice for riders who demand a "once-and-done" solution for their headset maintenance. Specifically designed for oversized or tapered headset systems, this bearing is constructed from 440C Stainless Steel. Unlike standard chrome steel bearings—which are prone to pitting and "indexing" when exposed to the elements—the stainless steel races and balls in this unit are virtually impervious to rust, even when subjected to heavy rain, road salt, or falling sweat during indoor training.
This is a specialized Angular Contact (ACB) bearing featuring a 36° internal and 36° external chamfer. This specific geometry is engineered to handle the unique combination of radial and axial loads found in bicycle steering columns. By distributing pressure evenly across the polished stainless tracks, the 36-degree contact angle ensures incredibly smooth steering and prevents the premature wear often caused by the vibration and impact of off-road or high-speed road riding.
440C Stainless Steel Construction: Forged and precision-ground from high-grade stainless steel to provide total protection against corrosion and oxidation in the harshest environments.
36° x 36° Contact Geometry: Specifically designed with matching internal and external 36-degree angles to optimize load distribution and eliminate "steering play" in compatible headsets.
High-Pressure Marine Grease: Factory-packed with a specialized waterproof lubricant that resists wash-out and maintains its viscosity through thousands of steering cycles.
Mirror-Polished Races: The internal ball tracks are polished to a high-gloss finish, reducing friction and ensuring a light, responsive feel at the handlebars.
Dual-Lip Labyrinth Seals: Features heavy-duty seals that act as a redundant barrier, keeping road grit and moisture out while locking the essential lubricant in.
Built for Longevity: Ideal for integrated cable routing systems where the complexity of replacement makes bearing durability the highest priority.
| Feature | Specification |
| Dimensions | 40mm (ID) x 51mm (OD) x 6.5mm (W) |
| Material | 440C Stainless Steel |
| Contact Angle | 36° Internal / 36° External |
| Bearing Type | Angular Contact (ACB) |
| Seals | Dual-Lip High-Contact |
| Grease | High-Fill Marine Grade |
Indoor Training Enthusiasts: If you spend significant time on a stationary trainer, the stainless steel construction is essential to prevent sweat from seizing your headset.
Coastal & Wet-Weather Riders: Perfect for those who live near the ocean or ride through the winter, where salt and moisture normally destroy standard steel bearings.
Mechanics Seeking Precision: The 36° x 36° profile is a specific fit for high-end framesets that require this exact chamfer to seat perfectly within the head tube or crown race.
Standard 45° x 45° Headsets: This bearing uses a 36-degree angle. If your frame or compression ring is designed for a 45-degree angle, this will not seat correctly and could damage your headset. Always check the markings on your old bearing.
Ultra-Lightweight Racing: While stainless steel is the benchmark for durability, it is slightly denser than ceramic. For a "weight-no-object" build, you might consider Enduro Ceramic alternatives.
The 36° internal and external angles are the defining characteristics of this bearing. Before installation, use a clean rag to wipe out the headset cups and ensure no old grit remains. Even though the bearing is stainless steel, we recommend applying a layer of waterproof assembly grease to the external chamfers. This provides a "gasket" effect to keep water away from the frame and prevents creaking caused by micro-movements between the bearing and the head tube. When tightening your top cap, only apply enough preload to remove play—over-tightening is the number one cause of premature bearing failure!
