18" wheels

67/6barracuda said

Just general discussing really. I think the rears will work out fine. I'm already looking at set of billet 20mm hub centric spacers. The front I'm a little more skeptical because of the larger and longer hub register. Is it easier to bore the rim, the rotor hub, or find some funky hub centric combination spacer that goes from 71.5mm or 70.5mm?

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I agree, depends on the wheels. I had the hub bores on my RPF1’s opened up, they started at 73mm but tapered down to where the cap mounted. So I had them opened up to 73mm all the way through. But not all rim designs lend themselves to that modification.

The hub register on the rotors can be turned down too. It just depends. On a stock rotor hub register you could knock off some diameter for sure, probably more than you’d think. On an aluminum hub like some of the aftermarket brakes use I wouldn’t want to take much of any off the hub.