RT-S S81 Series Wheel 17x10 5x4.5 BC 8 BS

The RT-S S81 Series Wheel 17x10 5x4.5 BC 8 BS from WELD Racing is purpose-built for serious street and strip enthusiasts who demand lightweight performance without compromise. This 17-inch diameter wheel delivers the aggressive stance and fitment control that modern high-horsepower builds require, whether you're tuning a muscle car, street rod, or dedicated drag platform. Weighing just 28.9 pounds, the S81 minimizes unsprung mass—a critical factor in suspension response, acceleration, and braking performance that separates precision-engineered wheels from commodity alternatives.

WELD Racing engineered the RT-S S81 Series with a 10-inch width and 8-inch backspacing to accommodate wider performance tires while maintaining optimal brake clearance and suspension geometry. The 5x4.5 bolt circle (5 on 4.5 inches) ensures compatibility with classic American chassis—primarily early Mopars, Chevrolets, and Fords—giving builders access to modern lightweight technology without custom fabrication. The forged aluminum construction provides strength-to-weight efficiency superior to cast designs, resisting deflection under cornering loads and maintaining tire pressure stability during hard launches or sustained track sessions.

Drivers upgrading classic vehicle suspensions, building pro-street machines, or preparing vintage-platform drag cars will find the S81's engineering ideal for fixed-width applications where bolt-circle and backspacing constraints are non-negotiable. Installation requires verification of your vehicle's hub bore diameter and lug nut seat type; the 5x4.5 pattern confirms compatibility, but wheel spacers or adapters may be necessary depending on your specific chassis. This is a serious wheel for builders who understand that wheel selection directly impacts handling, tire wear, and overall suspension tuning—making the S81 a cornerstone specification in any performance build list.