ProX Big End Bearings are engineered for maximum durability, precision fitment, and smooth engine operation, making them essential in engine rebuilds for motocross, off-road motorcycles, dirt bikes, and ATVs. Manufactured from high-quality bearing steel, these big-end bearings offer exceptional wear resistance, high load capacity, and reduced friction, ensuring optimal crankshaft performance and long-lasting reliability. Designed to meet or exceed OEM specifications, ProX Big End Bearings provide precise tolerances and easy installation, making them the perfect choice for performance upgrades or routine maintenance.