ENDURO ANGULAR CONTACT HEADSET BEARING 36 X 45 30.2 X 41 X 6.5

The Enduro Angular Contact Headset Bearing is a high-grade replacement part specifically designed for integrated and semi-integrated 1 1/8" headset systems. Measuring 30.2mm x 41mm x 6.5mm, this bearing is engineered to provide a rock-solid, play-free steering interface. Unlike standard industrial radial bearings, the Angular Contact (ACB) design is purpose-built for the unique stresses of cycling, where the bearing must simultaneously handle the vertical weight of the rider and the lateral forces of steering and cornering.

This model features a hybrid 36° internal and 45° external chamfer. This specific angular combination is a common standard for many high-end road and mountain bike frames, ensuring the bearing centers itself perfectly within the head tube and mates flush with the fork’s compression ring. Constructed with high-carbon chromium steel and Grade 10 precision balls, it restores that "new bike" steering feel while offering significantly better durability than generic original equipment.

Key Performance Features

• 36° x 45° Hybrid Geometry: Engineered with a 36-degree internal angle for a precision fit on the compression ring and a 45-degree external angle to seat perfectly in the frame's head tube.

• 52100 High-Carbon Steel: Forged and vacuum-degassed chromium steel races provide a hard, mirror-smooth surface that resists "brinelling" (the permanent indentations that cause notchy steering).

• Grade 10 Precision Balls: Features balls that are spherical within 10/1,000,000", ensuring even load distribution and reducing internal friction for effortless steering.

• Dual-Lip Labyrinth Seals: High-contact seals create a redundant barrier that effectively keeps road grit, dust, and moisture out while locking in the essential factory grease.

• High-Fill Waterproof Grease: Factory-packed with specialized marine-grade lubricant designed to resist wash-out and stay in place even during high-vibration off-road riding.

• ABEC 3 Tolerance: Manufactured to higher precision standards than basic industrial bearings, resulting in a quieter, smoother rotation and longer service life.

Technical Specifications

✅ Why This IS For You

• Owners of 36° Compression Systems: If your headset uses a 36-degree compression ring (common on many performance road and gravel forks), this specific hybrid angle is required for a secure, creak-free fit.

• Restoring Steering Smoothness: The perfect solution if your steering feels "indexed" or stuck in the center, or if you have developed front-end play that a standard adjustment won't fix.

• Value-Focused Performance: Offers professional-level tolerances and superior sealing at a price point that makes it an easy choice for regular maintenance.

❌ Why This May NOT be for you

• Standard 45° x 45° Headsets: If your headset is designed for a 45-degree internal angle, this 36-degree bearing will not seat correctly, leading to accelerated wear or damage to your fork steerer.

• Extreme Corrosive Environments: While highly durable, this is a steel bearing. For riders in coastal areas or those who train heavily indoors, the Enduro Stainless Steel version of this size offers the ultimate protection against rust.

BFC Pro Tip

The 36° internal angle is the critical spec here. Before installation, check the laser-etched text on the side of your old bearing to confirm the angles match. When installing, apply a generous amount of waterproof assembly grease to the chamfered edges and the internal head tube seat. This creates a "gasket" that keeps water away from the bearing and prevents the annoying "creaking" often associated with modern carbon frames. Tighten your top cap just until the play disappears—over-tightening is the primary cause of premature bearing failure!