Yes, there are tubeless bicycle tires.
Tubeless bicycle tires, often called "low-pressure tires" or "vacuum tires," are indeed related to the concept of a "vacuum," but they are not a completely vacuum-like state. Here's a detailed explanation of tubeless bicycle tires:
Structural Features: Tubeless tires do not have a traditional inner tube. Instead, air pressure is maintained by an airtight layer formed between the outer tire and the rim. This design reduces the risk of inner tube punctures and improves tire durability and safety.
Classification: Tubeless tires are mainly divided into radial tires and bias-ply tires. Radial tires have the cords of the ply aligned with the tire's radial direction, resulting in better strength and wear resistance; while bias-ply tires have the cords of the ply arranged at an angle to the tire's centerline, making their structure and performance relatively simpler.
Usage and Maintenance: When using tubeless tires, it is necessary to ensure good airtightness between the rim and the tire to avoid leaks. When inflating tires, use the appropriate tire pressure; excessively high or low pressure can affect tire performance and lifespan. In addition, regularly checking tire wear and pressure is also an important measure to maintain good tire condition.

