Wheel rim -OEM QUALITY 2.50-10 inch- Vespa (type Cosa/SKR) -

The wheel rim of the famous Vespa COSA range comes with a standard width of 2.50-10. This is 0.4 inches more than on the standard Vespa Smallframe or Largeframe wheel rim.
This is interesting for you, if you are looking for a wide rim conversion one. It can be used with the low cross-section tires. The 100/90-10 is widely used. One to watch is the clearance at the front fork and clutch cover. Depending on the manufacturer of the tire this combinations works or not. Even if the manufacturers use the same indication the real size varies very much.