This is Cherie's Fiesta ST with 12.5mm axle spacers on the rear, 17 x 7 alloys with a ET34 (so are in towards the car 4mm than ET30) and lowered on H&R:









You wouldn't really want to go much lower or wider (lower ET) as it might start to catch. 4mm might be ok though and easier if not lowered. Doesn't catch anywhere at the moment though.