The main raw material for these tires is a special rubber material; except for a small hollow section in the middle to maintain the center of gravity, they are entirely solid. Tires made this way can provide protection against nails, bullets, landmines, and Molotov cocktails, making them popular with law enforcement personnel. However, solid tires are very heavy, and their handling is not ideal when installed on a vehicle, so further improvements by professionals are needed.
Solid tires can be categorized by their intended use into non-marking and environmentally friendly types, conductive types, optional extras, standard types, oil-resistant types, and high-load-bearing types.
Non-marking and environmentally friendly tires: These are generally light-colored, such as white, gray, green, and yellow. They closely resemble the ground colors used in certain industries, leaving little or no tire marks during use, keeping the ground clean. They are used in industries requiring high cleanliness, such as pharmaceuticals, electronics, food, and automotive.
Conductive tires: These release static electricity during use, preventing sparks and thus avoiding fires. They are generally used in industries handling flammable and explosive hazardous materials such as gunpowder, oil, and chemicals. Conductive tires are only available in black.
Alternate-fit solid tires: Mostly used on European cars, such as Linde, Jungheinrich, STILL, and OM; also known as quick-release solid tires.
Standard solid tires: Suitable for most car models.
Oil-resistant solid tires: Solid tires designed for use on roads heavily contaminated with oil or other substances.