26-inch bicycle tire diameter

26 inches means that the wheel diameter of the wheelset is 26 inches, 1 inch =2.54 cm, and the diameter is 2.54*26.

The earliest bicycle tires were made of wood. After several years, rubber was widely used, and the wheel gradually changed from wood to hard rubber.

The traditional dimension system is based on the measurement of tire outer diameter. This method is usually in inches (26 inches, 27 inches, etc.). ) or centimeters (650,700, etc. ).

Unfortunately, the development of tires and rims makes this measurement method no longer conform to the actual situation. Let's take an example to see why: 26×2. 125 was the most popular size of heavy-duty "Baron tire" bicycles in the late 1930s, and this size of tires is also common in today's "beach cruisers". The actual diameter of this size tire is very close to 26 inches. However, some riders are not satisfied with this kind of tire. They want lighter and faster tires. Therefore, a "medium-sized" tire with a nominal size of 26× 1.75 was produced in the industry, which can be applied to similar rims. Although they are still called "26 inches", the actual size of these tires is 25 5/8 inches, not 26 inches. The same rim size was also adopted by klunker pioneer on the west coast and became the standard for mountain bikes. In the market, you can find a tire as narrow as 25mm to match this kind of rim, and the actual size of this 26-inch tire is almost 24 7/8.