well ats cups did'nt fit over my 280mm brakes, specifically the wheel weights on the inside edge so i relocated them to the outside edge, also need to fit a 3mm spacer however its still so so close that when i fit new disks and pads i will prob need a 5mm spacer. also on a lowered car this puts the tyre closer to the arch. ronnal's are a similar to cups in fitment i would imagine. 280mm brake calipers are bigger than you think. mabye this will help you mabye it wont.
