I've got an 05 LX sedan with the stock 15" steel wheels and I know I'm going up in size to a 16" or 17" but my question is, what offset do I need in order for the wheels to sit flush with the fender well (like in the picture)? It's not lowered (yet) but when I do, I'm thinking only a 1.5-2 inch drop; nothing extreme.

Somewhere from +15 to +25. Depends on how wide you go as well.

That's a pretty big range. I'm only looking at wheels that are 7" - 7.5".

Well yeah, offset depends on wheel width. He was flying blind.

There’s a thread here somewhere that can calculate it for you. I’d grab it if I wasn’t on my way to class. @xRiCeBoYx

wheel-size.com