The large diameter steelies (Stockton) used standard 15" centers with the diameter added in the rim portion. That means they have about the same brake clearance as a 15" wheel... no go for anything bigger than an 11 3/4" OE style rotor. That made them a non-starter for me before I even figured out the weight.

Now if somebody designed and manufactured a steel wheel without the weight and brake clearance penalties... I'd be interested.