Surely the wheels locate on the studs and nuts. The wheels I've seen that fit nice and tight on the center (hub) seem to be on kacky FWD stuff ( with bolt rather than studs) and often have to be removed with a gert hammer, Seen um have to be burnt off with a gas axe. Not the way to go in my opinion.if you go for the pop brown ones you will need to have spacer rings made to locate the wheel, the viva wheel location is aproximately 51mm but most american wheels are 76mm. pop browns do also supply a kit with hubs made to accept american wheels but these dont accept standard brakes, it includes an upgrade to use capri vented disks and modern callipers. if your going to the trouble of upgrading the hubs it seems sensible to get better brakes at the same time. if i can work out how to post pics i will post some of this conversion.