There are different types of brackets - one with short studs and one with long, for wheel facing either inward or outward, I am however not sure whether they are specifically for alloy rims or steel.
I suppose it depends on what you prefer? With the long studs you may be limited w.r.t. bigger tyres.
I have the short stud bracket with alloy rims, 31x10.5 tyres with about 8mm clearance.