Insert your existing wheel and tyre specs, and the desired size, and the outcome is shown on the diagram.
Compared to your existing wheel, this new wheel will have an inner rim which is 1mm further away from the suspension strut. The outer rim will poke out 39.1mm more than before.
The strut shown in the diagram is for show only. Don't worry if the wheel looks like it fouls!
Bear in mind most tyre manufacturers vary slighty from the specs, and that it could be dangerous to run tyres on wheels they aren't designed to fit.