• 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 (+/- 3 mm). Carcass casing materials have become more and more sophisticated over time. That reduces the tire widening after the fitting. Furthermore, inflation pressure also plays a major role. With maximum inflation pressure the tire becomes wider than with low pressure. And a recently fitted tire still widens over time. This cFew readers

• Where can i find the tire size on my Marathon Plus Wheelchair tire?

  The tire size for our Marathon Plus Wheelchair tire is embossed on the tread cap and can be located at the transition point between tread cap and sidewall. Marathon Plus Wheelchair size labelFew 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