Let's briefly talk about the composition of tires. A tire with an inner tube is composed of an outer tube, an inner tube and a cushion belt. The outer tube is an elastic rubber bag, which can prevent the inner tube from mechanical damage, keep the inflatable inner tube in the specified size, bear the traction and braking force of the vehicle, and ensure the grip between the tire and the road. The inner tube is an annular rubber cylinder, which is placed in the outer tube and filled with compressed air. There is a cushion belt between the inner tube and the rim. The cushion belt is an annular tape with a certain section shape to protect the inner tube from wear. The main disadvantage of inner tube tire is that the driving temperature is high, it is not suitable for high-speed driving, and it can not fully ensure the driving safety. When in use, the inner tube is in an extended state in the tire, and a small hole will be formed by slight puncture, which will quickly depressurize the tire.
Notranja cev se ne uporablja, zrak pa se neposredno napolni v notranjo votlino zunanje cevi. Tesnost pnevmatike je dosežena tako, da se zunanja pnevmatika tesno prilega na platišče posebne strukture. Da bi preprečili razpršitev zraka skozi steno pnevmatike, je notranja površina pnevmatike obložena s posebnim tesnilnim slojem, tako da lahko zrak med predrtjem izteka le iz perforacije. Vendar pa je perforacija stisnjena zaradi elastičnosti materiala pnevmatike, zrak pa lahko iz pnevmatike izteka le počasi, zato se notranji tlak v pnevmatiki postopoma zmanjšuje. Prednost pnevmatike brez zračnice ni le v izboljšanju varnosti pri vožnji, temveč tudi v nadaljevanju vožnje, ko je luknja pnevmatike majhna. Lažje je popraviti na sredini kot pnevmatiko brez zračnice brez odstranitve platišča, zato rezervne pnevmatike v nekaterih primerih ni mogoče uporabiti. Pnevmatika brez zračnice ima dobro mehkobo, kar lahko izboljša učinkovitost oblazinjenja pnevmatike. Pri visoki hitrosti ima majhno proizvodnjo toplote in nizko delovno temperaturo, kar lahko izboljša življenjsko dobo pnevmatike.
