Reply to "wheel spacers"

Just my opinion on this. Wheel spacers are terribly dangerous on any car but in particular with a vehicle of this speed potential.

First of all they are going to HAVE to be "hub centric" for both the wheel hub and the wheel.

Secondly the safest way to bolt them on is with longer wheel studs, not two sets of bolts, one set bolting the adapter to the hub, then the other set bolting the wheel to the adapter.

That isn't to say that these longer studs are particularly safe to do this with. The longer the stud, the more twisting it will do when torqueing on the nuts.

You can not have threaded areas of the studs in the shear area loadings on the studs. The studs WILL fail through one of the threads.

One will "go", then the others will follow. When they fail, they almost sound like "explosive" bolts in a bail out. Ask me how I know?

Fortunately the car went down "gently", jettisoned the wheel and skidded across a grassy section with no obstructions. It just made a muddy mess. The tire wound up in a tree.

So you really are looking and specially made studs to your application, specially made spacers to your application.

By the time you do all that you probably would be better off just putting a set of 16, 17, 18" Campi "clones" on the car.

At least there you aren't risking your life, someone else's life and the car in a catastrophic mechanical failure?

Those are really pretty spacers but the mass of them also adds to the shear action on the studs.
That entire section of stud that passes through the adapter can't be threaded. It needs to be solid.

Ask any aircraft engineer.

Buy the wheels.