Haven't been able to find any decent information about these.
I've found a stud conversion kit on eBay, it's basically a set of studs, 12x1.5 on both ends. About 10mm of thread, and then maybe 35-45mm on the other end. They appear to just screw in to your hub, probably would help to use some Loctite. But has anyone actually had much experience with these? I'm just thinking it seems a little suss, normal studs have the small backing piece, they physically can't come out, where as these just wind in.
The other option I know a couple people have used is to get BMW bolts, or aftermarket bolts off eBay, but all the bolts I've been able to find have a taper, where the wheels I have to go on don't. You can buy extended shank wheel NUTS at pretty much every auto shop here, but I haven't been able to ind any BOLTS that are a similar design.
Any information/help/ideas would be appreciated, thanks guys!