Can any one help?

I just got some 15" alloy on my fiesta i have i have been asured they fit but they seem to rub when i go round corners they clear the arches ok but the rear seems spoungey i think i need some stiffer springs but wat do i buy or do i evan have to buy more can anyone help

Thanx Craig

yep you need stiffer springs
phone around your local dealer what clearance have you got with the car with no weight in