I got the smoothie wheels instaled (real, not photoshop) and went from 235 width to 275 on the rear wheels. As the rear wheels are closer together than the front wheels (with 235 tires), I think this looks just about right.

In Holland the road tax is a lot cheaper when you have a "grey" registration, meaning that the vehicle is used by a company. To have your vehicle registered in this class it has to meet a number of requirements, one of them is that if it has more than one row of seats you are required to have a closed freight compartment. In my case this compartment was about 30 cm (1 foot) too short to transport my bikes, so I started doing some "modifications"... They do fit now!