Mountain Bike Headset Kit — steel ball bearing replacement set for precise steering and reliable fork rotation Key benefits Restores smooth fork rotation and accurate steering on standard mountain bike head tubes. Longlasting steel bearings and optimized steel raceways reduce friction and resist erosion for cleaner operation and longer service intervals. Multiple sizes and a precise fit allow direct replacement without modification or adjustment to most head tube assemblies. What it does Replaces worn or damaged headset bearings with quality steel ball bearings and upper bearing steel for consistent steering accuracy. Engineered raceway surfaces minimize friction buildup and resist wear from exposure to dirt and moisture, maintaining dependable performance under regular riding conditions. Compatibility and sizes Designed for general use with mountain bikes that use steel ball headset bearings. Size options included for head tubes: 28.6mm, 30mm, 44mm, 41mm, 41.8mm, 47mm, 49mm, 51mm, and 52mm. Matches common headset standards for easy integration into existing head tube assemblies. Materials and performance quality steel ball bearings for durability and consistent rolling performance. Optimized steel raceway surfaces to reduce friction and slow erosion, helping maintain steering precision and extend maintenance intervals. Practical applications worn headset bearings after prolonged trail use to eliminate play, roughness, or binding in the steering. Upgrade older mountain bikes that currently have degraded bearings to regain smooth handling for crosscountry or technical trail riding. Routine maintenance: install fresh bearings during a bike overhaul to restore factory steering feel and improve the life of surrounding components. Why choose this kit Precise fit across multiple common sizes avoids the need for machining or adapter parts. Steel construction and raceway design focus on dependable, longterm steering performance rather than temporary fixes. Straightforward compatibility with most standard mountain bike head tubes makes it a practical or maintenance choice. Included / installation notes Bearing set intended to existing headset ball bearings; installation requires appropriate headset tools and adherence to manufacturer service procedures. Verify your head tube size from your bike specifications before ordering to ensure correct fit.