20mm Spacers all around

Long story short, I'm lowerd on BC Coilovers BR Type with BF Goodrich 255-45-18 and 235-50-18 on MPars... Would like to install the 20mm spacers all around but I'm afraid it will STILL rub even when I roll/pull the fenders... Has anyone else done this setup? Or will it rub? Reason for big beefy tires is because the roads of Brooklyn will murder your wheels lol

Thx guys.

20mm Spacers all around