Bearing Kit for King Pin

The JOES Racing Products Bearing Kit for King Pin (MPN 25640) is a precision spindle thrust bearing assembly designed for racing and high-performance marine spindle applications. This roller bearing kit addresses the critical load-bearing function at the king pin—the pivot point that controls vertical spindle movement—making it essential for maintaining responsive steering and directional stability under demanding offshore and competitive boating conditions.

The king pin bearing assembly carries vertical loads and enables smooth articulation of the spindle assembly, which directly affects steering feedback and cornering precision. A properly functioning bearing kit reduces play and slop in the steering system—factors that become critical when operating a performance boat at speed or when towing heavy loads offshore. The compact design (2 × 0.3 × 3.1 inches) and lightweight construction (0.03 lbs) allow for straightforward installation into existing spindle assemblies without requiring frame modifications or extensive downtime.

This bearing kit is intended for boat owners and marine technicians who prioritize steering responsiveness and want to maintain OEM-specification performance in their spindle systems. Serious fishermen operating offshore boats, tournament competitors, and boaters in saltwater environments benefit from proactive bearing maintenance, as marine conditions accelerate wear in load-bearing components. Whether replacing worn original equipment or building up a new spindle assembly, this JOES Racing kit provides the precision fit required for consistent steering geometry and reduced operational wear across the entire steering system.