Sorry no one answered you. Depending on how low you are, anything more than 20mm will be a nightmare for your fenders. I have 25mm all the way around cause I'm using stock wheels with an EBC big brake kit. I'm on coilovers with a function over form height. The rears never rubbed even before the DNA camber plates I installed. The fronts rubbed on hard dips and if my pops was in the passenger seat while taking hard left turns. With my front camber at -2.5° now I don't rub. Anywhere. Ever. I like a square track width all around so my vote is go with 20mm all the way around. Hope this helps