wheels with offset to push them out of the wheel wells will have a different effect than adding wheel spacers. offset wheels still transmit all their weight to the suspension at the stock point.. adding wheel spacers or adapters moves the point the weight is transmitted out away from the suspension..

the other thing is that the farther away from the hub your wheels get.. the more they travel when you turn

adapters that are bolted to the hub and have their own wheel studs would probably be OK but still not a great idea.. you have to make sure they fit absolutely properly.. and you are still adding 6 points to each wheel which could have a defect..

if you do decide to use them.. check your lugs often (including the ones that hold the spacers to the hub)