The core principle of changing a bicycle inner tube without removing the wheel is to utilize the elastic space between the rim and the tire, eliminating the need to completely remove the wheel. In practice, you can partially peel off the tire using a tire pry bar.
In most cases of a flat tire, it's indeed not necessary to disassemble the entire wheel system. The key steps are: first, completely deflate the inner tube. Using a tire pry bar, starting from the valve stem, gradually pry the edge of the tire away from the rim about 10-15 cm. The old inner tube can then be removed. When changing to a new tire, align the valve stem with the rim hole, insert the inner tube along the pried opening, and then use both hands to press the edge of the tire back onto the rim.
Note three key technical points: ① Use a suitable tire pry tool to avoid scratching the rim; plastic tools are safer than metal ones. ② Ensure the inner tube is completely inserted into the tire during installation to prevent the tire sidewall from trapping the inner tube. ③ When inflating to 30% pressure, check that the inner tube is evenly stretched, and finally inflate to the standard pressure marked on the tire.
Some new bicycle tires now use high-elasticity TPU material, such as Specialized's Turbo series or Victoria's Corsa tires, whose bead design allows for manual installation and removal. Emergency tire patches that require no pry bar are also available on the market, using strong adhesive to directly bond the puncture, making them a more suitable temporary repair solution for unexpected outdoor situations.
