Anybody running 17" Cobra Bullit rims on a Duster

I think an 11" rim is physically 12" wide. The bead is 11"

While your rims are on your car you can just measure off your existing rims (get your rim actual specs) to get your capable additional space.

Here is a good program - website for tires and rims estimations

http://www.rimsntires.com/specs.jsp