You may be right about the 4.5 & 5.5 wheel center/transition being the same and consequently the 5.5 wheel doesn't work either....it's Scarebird's claim that it will.
I know a 4.5 wheel doesn't work (as the Scarebird's kit is setup) since I've gone thru that installation(on two cars) & tried 10 wheels (7 new) without success. sfcuda raised the exact point that I did wrong.....I bought the kits & wheels & tires without investigating whether they would work with each other...once committed I had to jury rig up a solution.
I made the 4.5 wheel work by using spacers, machining the taper on the hub, & installing an inside tapered bushing on the hub to catch the newly spaced out wheel location.
The point raised/questioned by sfcuda is that wheel selection should be coordinated with disc brake kit conversion & if considering the standard Scarebird kit do not plan on using the 4.5 wheel. Cudos to sfcuda for forward thinking & investigating......
