From the perspectives of durability and compliance with relevant regulations, most off-road vehicles are equipped with wheels with positive offset when they leave the factory. If you want to stretch your car tires (increase the wheelbase), the best choice is to switch to the negative wheels. Currently, the common types of negative wheel hubs on the market are aluminum alloy and wrought iron, and their surface treatments are more diverse. Aluminum wheels are slightly more expensive and do not have the disadvantage of iron wheels being prone to deformation. It is also suitable for high-speed driving other than off-roading. The price of iron hubs is relatively low, and the common negative value in China is generally -25. Special hole spacing can also be customized, and the surface treatment is in black and white. Electroplating is the most common type and is currently popular. When buying wheels, it is essential to make sure of their installation width.