@all : thanks for the comments
@tom : these rims are the ones I modelled for my MK1 Rabbit GTI and were not the VW cheap rims, these are the ATS Cup rims that were on the Oettinger version (this model was sold only in France so less known I guess, it was the first Golf with a 16V cylinder head, and had 136 HP for about 900Kg

).
But I'm not offensed

without material, they look like cheap rims
I'll try to post some wires too so you can comment on my mesh.
EDIT : to precise what I said here is a render of the rim