Zhigu's racing rims are precision-engineered for optimal track performance, crafted from 6061-T6 forged aluminum with a TIG-welded barrel design for seamless strength. The rim profile is optimized using CFD analysis to reduce wake turbulence behind the wheel, improving aerodynamic efficiency by 8%. Forged rims offer a 22% higher impact resistance rating than cast equivalents, proven in JWL/VIA impact tests (1300kg weight drop from 150mm). The bead seat is heat-treated to 35HRC for tire retention during high-speed maneuvers, while the inner rim features stress-relief grooves to prevent cracking under cyclic loading. Available in widths from 7J to 12J, they accommodate tire sizes from 205/40R17 to 335/30R20, with optional beadlock compatibility for off-road racing variants.