King Pin Thrust Bearing .030 Thick set of 4

The King Pin Thrust Bearing .030 Thick set of 4 is a precision shim stack engineered for sprint car and high-performance racing applications where kingpin preload and suspension geometry demand tight tolerances. These steel thrust bearings eliminate excessive play in the front end while maintaining proper steering response and tire contact during aggressive cornering and acceleration. Built for competitors who understand that worn kingpin assemblies lead to unpredictable handling and accelerated component failure.

Manufactured from hardened steel, each .030-inch-thick bearing in this MPD Racing set is designed to work as a shim within the kingpin assembly, controlling axial load and reducing radial movement at the steering knuckle interface. The precise .030 thickness allows fine-tuning of kingpin preload without compromising steering feel or introducing binding. When stacked properly, these four bearings distribute loads evenly across the kingpin bore, reducing wear on the knuckle casting and extending component life during sustained high-g racing.

Sprint car teams and dedicated circle-track racers benefit most from this upgrade when rebuilding worn steering geometry or fine-tuning front-end handling characteristics. Installation requires disassembly of the kingpin fastener and knuckle assembly—a task best performed by experienced mechanics with proper kingpin press tooling. Each set includes four bearings, providing enough material to dial in precise preload across the complete front suspension or replace worn shims on both sides of the vehicle. Compatible with standard sprint car kingpin applications where .030-inch shimming intervals are required.