The tires have to stay in the wheelbox, right?

Hello community, I would have the following problem I am working on my prelude at the moment and had it lowered since now my 17 Zoller summer rims do not fit on it anymore, I bought new 16 Zoller lowbed rims. These will certainly stand out and that is unfortunately not allowed. If I am my fender widening and the rims in this distribution is again in the green area? There are so “Fender flares” on eBay that you can screw on with part reviews n etc. my thought was that this is a good “emergency solution” corrects me if I’m wrong.