Engineered for precision headset performance, this drop-in kit accommodates IS42/IS52 head tube standards with tapered 1.125" x 1.5" steerer forks. Features premium 440C stainless steel bearings with 45°/45° chamfers, a concealed bolt topcap preload adjuster for tool-free tuning, and includes the crown race and compression ring. Designed for riders demanding reliable steering geometry and smooth rotation on demanding terrain.
Built with Enduro's commitment to durability, this headset delivers 440C stainless steel balls and races paired with dual-lip seals at both bearing points. The 90% bearing fill uses high-pressure waterproof grease to resist contamination and extend service intervals. Backed by a lifetime warranty for as long as you own the bike, it's engineered for serious riders who demand reliability in all conditions.
This kit pairs precision 440C stainless bearings engineered to exacting specifications: the upper bearing (ACB 4545 1125 SS) measures 30.5mm ID × 41.8mm OD × 6.5mm width, while the lower (ACB 4545 150 SS) is 40mm ID × 52mm OD × 7mm width. Though these bearings differ in width from standard replacements, they maintain proper stack height when installed. The included HD-120 upper spacer accommodates tight head tube clearances, with optional WA-45 1x150 lower spacer available separately for additional adjustment flexibility.
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