What do you guys mean by rolling up to fit 17x8s?

I don't have any pics but using a rounded wooden bar (old baseball bat) pry against the tire as a fulcrum and bend out (towards the fender) the inner edge of the fender lip. Start with only an 0.25 inch or so, you can bend it more later if needed.
 
There are probably more ways than one but a rubber hammer .ould work. Just try to be gentle go inch by inch and hit it till until it bends back towards itself. You could cut little slits every 5 inches or so to make it bend easier just be careful you don't cut to far so that it cuts into the fender where you can see it. One idea maybe not the best but it works.