I wouldn't do the ring type spacers that just slip over existing studs. The best/safest way to go is something like the Spidertrax or All Pro spacers, these bolt onto the existing studs and have new studs for the wheel to bolt onto. This is a much better design. It does come at a price, but do you want to take a chance on the only thing keeping your vehicle connected to the road? I've actually had a tire come off while driving when using the ring type spacers, there wasn't enough threads for the lug nuts (wasn't on my 4runner though). Won't be making that mistake again. Love my spidertrax!