Quote Originally Posted by dobbo View Post
I have seen two forms of spacers

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2: (the safer way) The spacer bolts on the same but uses it's own flush mounted locking nuts (whether the existing studs are shortened or are completely covered by the spacer, who knows) The spacer then has it's own wheel studs in which you mount the wheel to.
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Dobbo

AFAIK what you describe as "spacers - the safer way" are sometimes described as hub adapters to get around the wheel spacer terminology. Whether this makes them legal I have no idea.