Between 1890 and 1929, most tyres used on European cars and motorcycles. had a beaded edge. These tyres, also known as “veteran” or “vintage” tyres, continued to be fitted on some vehicles after manufacturers discontinued them.
Beaded edge tyres have large ridges of hard rubber beads around the interior circumferences. The beaded edge fits into the clincher of a beaded edge wheel rim, and is held in place by 60 psi or more of air pressure.
A vintage tyre, using the beaded edge system, uses measurements that refer to the overall tyre dimensions and not to wheel rim diameter. American sizing is based on inches, and European measurements are based on millimetres.