• What is the circumference of my tire?

  In order to accurately program a bicycle computer , it is generally necessary to enter the exact tire circumference. The tire circumference varies depending on the rim, the inflation pressure and the load on the tire. For these reasons, it is not possible to list an exact tire circumference. In order to accurately program a bicycle computer, we rePopular

• Tire width and inner rim width compatibility

  A tire's profile when mounted varies greatly on the width of the wheels rim. As mentioned in other articles, a wider inner rim width will yield a wider and flat profile. A narrower inner rim width will result in a voluminous shape that resembles a light bulb. The ETRTO has recommendations for such combinations of tire and rim width. To optimize safety and performance, it is alwaysPopular

• Why are tires sometimes narrower than their listed size?

  In order to ensure that tires have sufficient frame clearance, tire manufacturers generally prefer to keep production closer to the lower end of the permitted tolerance (+/- 2 mm). Once mounted, inflation pressure plays a major role in the tires measured width. With maximum inflation pressure the tire becomes wider than with low pressure. This continues until the tire is fully stretched out. Such a break-in period can require 40-50km of riding before the tire has stretched out to it's finalPopular

• What are all the tire sizes?

  The following list shows most common tire sizes. For virtually every tire size, you should be able to find a corresponding ETRTO-size with corresponding Inch and/or French size.Few readers

• How are tires measured?

  Nowadays, bicycle tire sizes are all marked according to ETRTO (European Tire and Rim Technical Organization) standard. Modern Inch size nomenclature is often used. Older English and French tire size dimensions are still used as well. ![The three most common ways of measuring tires are ETRTO, Inch, French](https://storage.crisp.chat/usersFew readers

• What is the difference between 28" and 29" tire sizes?

  There is no difference. Both tire sizes have the same inner diameter of 622 mm and can therefore be fitted on the same rims. In Europe, 28 inches is a traditional size for touring bicycles. In many countries it is even the most frequent tire size used. In countries outside Europe the rim diameter of 622 mm is only rarely used. Bicycle travelers who want to buy spare tires for a 28-inch touring bicycle anywhere in the world, can tell you a thing or two about it. A few years ago 29 inch tires weFew readers