Wide 5 Mangels 15x5.5 Backspacing Differences

[theastronaut]

I've been wanting to replace the 4.5 Mangels on the front of my '64 with 5.5's, so I'd been looking for a pair. I found a single wheel awhile back, and just bought another 5.5 but the backspacing doesn't match the first wheel I bought. I haven't checked the two I already had on the rear yet, but these are 3 7/8" and 4 1/16". I may cut the centers out and move them inward to even out the backspacing and deepen the lip for a wider track on the rear. Anybody else ran into this problem before? I thought they'd all be the same.
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Strive for perfection in everything. Take the best that exist and make it better. If it doesn't exist, create it. Accept nothing nearly right or good enough."
-Sir Henry Royce, co-founder of Rolls-Royce

'64 Beetle Sunroof OG Bahama Blue
'63 Beetle Vert
'66 Beetle
'88 Festiva L
'89 Festiva L
'64 Chevy C10
'66 Chevy C10

[duglia]

euro wheels have backspacing in mm.
(well, in fact it is the offset from the center of the wheel)

usually 5.5 have et 34 mm or 25 mm.

better find a correct pair!