is 20+ to 38+ offset bad?

[TonyJZX]

you know what cars these are off...

source of cheap alloys basically

[2DIE]

Commodore's use around +24 to +38 depending on the model but they are all interchangeable. The difference is only 1.8cm

[Adds_05]

id imagine they would rub something shocking.from what i understand,usually mags to suit a commodore run an offset around +43 to +45 without any rubbing. my 19s run an offset of +45 and they dont rub at all on my vr and yet my old 19s had an offset of +40 and they used to rub on a big bump up in the front guard

[2DIE]

^^ Depends how wide and tall they are

Wheel / tire size calculator / comparer - RIMSnTIRES.com

that kicks ass for working out what offset and sizes to use, put the factory rim in the left and the rim you want in the right, then it tells you down the bottom if it will fit.