Why Are Tires Not Solid

[Lawrence]

Tires are not solid for the following reasons: 1. Comfort: Radial tires have excellent anti-jolting properties, relying not on the rubber's own elasticity but on the good rebound force between rubber molecules, which provides extensibility. Solid tires have poor comfort, as cars cannot rely solely on the rubber's own elasticity to cushion road bumps. 2. Cost: The cost of a solid tire is much higher than that of a radial tire, making it too expensive. 3. Impact on speed: Solid tires cannot operate at high speeds due to their excessive rebound force, significant weight, and the friction with the ground, all of which greatly affect vehicle speed.