Help with Hubcentric Rings

[risgate]

Hello all,

I am a newbie, (lets get that out of the way), I bought a set of M-Pars from a guy who had them on a newer 7 series. Two of the rims are OEM, two are Reps, Will I need hubcentric rings with these, and if so, what size and if I need them, are there stores that I could pick them up from, or are they strictly mail order. Thanks in advance.

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[98M3_4]

Measure the hub bore of the OEM Mpar's and the replicas to know for sure what hub bore you're dealing with.
Do you know if the person you bought them from was using hubcentric rings to fit them on his 7 series? If he was using them, then these wheels are most likely E39 5 series fitment, with the 74.1mm hub bore, and he was using the hub rings to fit them on his 72.6mm hub.
If he wasn't using hub rings, then the hub bore on those wheels are 72.6mm, and you will need to have the hub bore machined out to 74.1mm by a machine shop.