whats up guys, i just got my Work T1s on my g coupe today its 225/35/20 front and 255/35/20 in the rear and i noticed that with me and 3 other ppl in my car i would rub on pot holes and hills

any suggestions/advice on stiffer suspenstion that i should get to not have this rubbing problem when i have weight in the back

any advice would be appreicated, thanks