I've got one of those Choppers US Super Fat frames, a wide S-A rear hub & 24x4 rear rim, and a single-disc & 24x3 front rim. I'm planning on lacing the wheels in 3-leading/3-trailling fashion: http://www.minortriad.com/wheel.html
My concern is that the wheels are going to look awful empty &/or flimsy with all that rim & hub & tire and proportionally skinny spokes tying it together. Is there a source for larger spokes and nipples? The longest motorcycle spokes seem to be for 21" wheels with even bigger hubs.