Hello,
I used 195/50 R15 tyres on them. They scrubbed quite hard without any guard madification.
Right at the bottom front of the guard where it attaches to the front apron bit.
Got a hammer and belted it out so that the guard went straight and continued on the line that it was on and didn't curl back in like it does normally.
I also then lipped and rolled the guards a little bit too.
Used a base ball bat
I haev never done those things before. But I had a spare set of guards that I am going to use when I repaint the car so I thought I would give it a go.
And if I can do it then so can anyone.
Just need a little bit of touch up paint on the edges of the guard where it was rolled.

In this picture here it still has the (I think) 195/60 15 rubber on it which I got changed.
If I haven't explained this correctly. (Which I probably haven't) then jsut tell me and I will try and explain it better..