wheel adapters

RedFish said
The spacers change the backspace about an inch outward. No big deal there.
The sppacers got a bad reputation years ago. The instructions plainly state "mount flush to the drum surface" yet so many would ignore the interfearence of balancing weights welded on the brake drums. Maybe they didn't have a grinder to remove a small portion of the weights. Anyway...
If the adapters are properly installed they are fine for normal street driving duty.

Agreed. Just make sure they're hubcentric- to the car's hub, and to the wheel's centerbore. You don't want to have the whole vehicle's weight on the studs alone. The centerbore of the wheel needs to index on some sort of center hub, and transfer the load to the axle/hub. This an example of a hubcentric adaptor (note the raised "hub" around the center hole)...

This is NOT what you want!...