Maximus baby

I order a set of 18 inch Neeper Shadows off ebay a week or so back and finally got them today. Well i was looking at them and they said 120mm on them and the ad said nuthin about that. So I went to a local shop and asked about wheel adapters and he said u cant put them on front wheel drive cars. So i came back and was wondering was the guy right. Should I just sell them and get some more or will the adapters work.