[Tom Goldman]

1/2" is the max I would ever use , and I will only use them on a car with 5/8" studs. .....I recently had to put 3/8" spacers on my car to clear the calipers with a new set of rear wheels..almost a thousand HP and no problems .......A lot of the old zinc die cast spacers are to blame for the bad rap spacers have ,the surfaces were not parallel and they were soft ,so the lugs often came loose. ......S&W and others make excellent steel spacers that are perfectly safe to use. .....Tom