Enduro

HDK-0012 Drop-In Headset Kit - IS42/28.6 Upper | IS52/40 Lower - 45x45 - Tapered

The Enduro HDK-0012 Drop-In Headset Kit is a precision integrated headset solution for frames that use an IS42/28.6 upper and IS52/40 lower interface with a 1-1/8" to 1-1/2" tapered fork steerer. Built around Enduro’s angular contact bearing design with matched chamfers, it delivers stable steering under braking and cornering loads while maintaining smooth rotation for long service intervals. Premium bearing materials and a heavy grease fill help resist water intrusion and contamination—key for riders who see wet weather, mud, or frequent washdowns.

• IS42/28.6 Upper | IS52/40 Lower - Correct fit for frames specified for integrated (drop-in) bearing seats in these sizes
• 45x45 Angular Contact Bearings - Designed to manage combined radial and axial loads for consistent steering feel
• 440C Stainless Balls and Races - Corrosion-resistant bearing materials chosen for durability in harsh conditions
• High-Pressure Waterproof Grease (90% fill) - Added protection against water and grit to extend bearing life
• Enduro Bearing Guarantee - Bearings are guaranteed for as long as the rider owns the bike (per Enduro)