Err, they are not, only 20'' rims are called DUBS see the following list for the names
Rim slang at a glance
Blade: Hip hop term for a stylish rim.
Dub: 20-inch rim
Rim: A wheel (not to be confused with a hub cap)
Six: 26-inch rim
Spinner: Rim that continues to spin after the car stops.
Sprewell: Alternate term for a spinner.
******* deuce: 22-inch rim
******* fo': 24-inch rim
******* tre: 23-inch rim
Or you can have a look here for some more info on that subject.



