Zhigu's aftermarket racing wheels are competition-proven, featuring 6061-T6 forged aluminum construction optimized for weight reduction and stiffness. The multi-spoke design reduces rotational inertia by 20%, while CFD-optimized air channels improve brake cooling by 28%. Available in 15-19" sizes with staggered widths (7.5-12J), they support tire sizes from 205/50R15 to 335/30R19. Each wheel is balanced to ≤10g and features a knurled bead seat for tire retention at high speeds. Tested to FIA Appendix J standards, they are used in professional drifting, rallycross, and endurance racing. Optional titanium fasteners save an additional 30% in weight compared to steel.