Zhigu's deep concave wheel rim offers dramatic styling and performance benefits, featuring a spun-forged aluminum barrel with concave depths up to 4.5 inches. The manufacturing process uses a 10,000-ton press to shape the rim, creating a dense molecular structure that enhances strength by 25% compared to cast rims. Available in widths from 8J to 14J, these rims support wide tires (up to 345mm) and provide a flush fender fitment for aggressive vehicle stances. A proprietary "ConcaveFlow" design optimizes airflow to the brakes, reducing temperatures by 15°C during track use. Each rim is CNC-machined with 0.01mm precision and certified to JWL standards.