The invisible inner tube is the world＇s first technology. It differs from the traditional car inner tube in the biggest difference. Traditionally, there is a copper gas nozzle, which cannot be placed in a high-speed tire with aluminum alloy (or steel ring). It will suffer because of Squeeze and wear the air nozzle. However, the stealth inner tube of the present invention is concealed inside the inner tube. As a result, after the tires have finished running, they can completely fit in with the tires.

The first generation of explosion-proof tires was introduced in the market in the 1930s. The tires are double-layered. The tires are the same as the general tires. The inner tubes are woven with double materials. The two are separated by air to prevent the loss caused by mutual friction. After the tire is pierced, the inner tube can still operate for a while.
   In the 1950s and 1970s, Christie＇s team took Goodyear and Dunlop to develop their own brand of explosion-proof tires. In the early 2000s, explosion-proof tires began to mature, and various automakers put some explosion-proof tires on their high-performance models at the factory. Among them, BMW was the most aggressive, replacing the spare tires with explosion-proof tires and vacating the rear compartment space. In the 2010s, technology was improved, and explosion-proof tires were quite common in light trucks and buses.
   The invention relates to a safety tire and an assembly method thereof, which have a casing and a concealed inner tube which are coaxially arranged. The inner tube is disposed in the inner space of the outer tire and has an inflatable space and a hidden air nozzle; the air nozzle is disposed on the outer surface of the inner tube to communicate the inflatable space with the outside. Wherein the inner diameter of the inner tube is smaller than the diameter of the annular opening of the outer tube, therefore, the invention has better assembly convenience at the same time. When the tire is pierced by a foreign body, the inner tube can provide a considerable degree of tire pressure to support the vehicle, allowing the driver to have sufficient strain time. In addition, the inflating inner tube＇s airing nozzle is inside the inner tube, so after the gas is exhausted, it can be completely closely matched with the high-speed tire, including: heavy-duty locomotives and even aircraft tires, which can be installed with invisible inner tubes.

一般汽車的輪胎、重型機車甚至飛機的輪胎，也可以加裝隱形內胎來使用喔！這樣可以減少爆胎的機率，提高生命與財產的損失。