Outer Limits 4x4 Board

I was running 15x8s with 33/12.5s on my mav , but have just put a 6inch lift in it and also put on some 35s on 16x8s and noticed on weekend when it flexs the tyres rub a bit on chasey on the rear.
I see some wheel spacers up for sale and thought that you would just put longer studs onto the axle to fit them , but have a pick on here with studs and nuts for them also they have the six wheelstud holes . Im not blonde but mayb having a blomde moment can someone pls explain how to fit as this may help my problem without having to get new rims with diffrent offset I think, thanks in advance DIZZY.

the wheel spacers bolt onto the hubs and then the wheel bolts onto the spacers..each spacer has 6 holes and 6 studs...

dave

thank-you for the help , as I said I was having a blonde moment and your help has now reassured as to what I thought that ya had to do with them , thanks again DIZZY