Are wheel spacers/adaptors safe?

[Browndog]

LOL I know, I was just kidding. I wouldn't run spacers but I've had no problems with the adapters I use. If you don't feel comfortable using either, make a set of 4 front wheels.

 

[Timbuick]

i just checked out your ride on Cardomain. Looks good and the wheels fit the arches nice.
My pic shows my whels too far in for my liking.