I'm looking at putting aftermarket rims on my 2001 blazer ls, I have found rims I like, but without the offset I would like, they have it in the right dimensions but with a larger hub size, is there a way to deal with this or do I just get spacers?

 

If the offset isn't enough enough you need spacers.

If the only issue is the hole that fits over the lip in the hub is too large- they make hubcentric rings to fix that issue