Enduro (Upper) Headset

Precision Steering. Weatherproof Durability.

The Enduro Headset Bearings are defined by their superior materials and specialized design. Most models feature high-carbon chromium steel or stainless steel races, paired with Grade 10 or Grade 5 balls for maximum roundness and smoothness. Because headsets are constantly exposed to sweat, road salt, and rain, Enduro uses high-pressure LLB or LLU seals and marine-grade greases to ensure the internals stay protected through seasons of abuse.

Why Enduro is the Mechanic's Choice:

• Angular Contact Design: Engineered to handle both radial and axial loads. This design prevents the "indexed" or "notchy" steering that occurs when standard bearings are subjected to the leverage of a fork.

• Superior Material Options: Available in Black Oxide (for corrosion resistance), Stainless Steel (for maximum longevity in wet climates), and even Ceramic for the ultimate lightweight race build.

• High-Fill Grease: Packed with specialized high-pressure greases that won't wash out during cleaning or heavy rain, significantly extending the service interval of your headset.

• Precision Tolerances: Machined to incredibly tight specifications to ensure a perfect fit in your headset cups, eliminating the micro-movements that lead to annoying frame creaks.

• Full Range of Sizes: Enduro offers a bearing for nearly every standard on the market, from classic 1" threaded headsets to modern 1.5" tapered integrated systems.

• Easy Identification: Most bearings feature the size and angle (e.g., 45°/45°) laser-etched directly on the race, making it easy to find the exact replacement you need.

Technical Specifications:

• Material: 52100 High Carbon Steel / 440C Stainless Steel

• Seal Type: Dual-lip LLU or LLB

• Ball Grade: Grade 10 or Grade 5

• Lubrication: Almagard High Pressure Grease

• Compatibility: Available for IS (Integrated), ZS (Zero Stack), and EC (External Cup) systems

The Alegro Perspective: In the shop, we consider Enduro bearings "insurance for your frame." A seized headset bearing can eventually damage your fork steerer or frame cups. Replacing a gritty stock bearing with an Enduro Stainless Steel unit is one of the most cost-effective ways to make an old bike feel new again. It’s a small part that makes a massive difference in how the bike handles at high speeds.

Smooth Rotation. Rugged Reliability. Support your Steering with Enduro Bearings.