while these rims fit my tj magna 235 45 r17 ??

That's a tyre, not a rim.

"while these rims fit my tj magna 235 45 r17 ??"

I have these size tyres on mine.

yeah will they clear the arches

Yeah they will fit mate, same size tyre on a 17'' ralliart rim

The more important question is whether they wheel is the current stud pattern and offset to fit.

That's a tyre, not a rim.

:clap::clap::clap:

The rims are 17x8 with a 38 offset

Yes they will fit no problem, a lot of us have those specs on our cars, just be mindful if you have wheel arch flares that's all.