There are of course limits to this, but you know that hole that's usually in the ceiling in the hallway or one of the upstairs closets? We call it the attic. That's a good place to store large items that you can't convince yourself to toss, but that are too large to store in a normal place and stay married. I have a set of running boards, some window casing material and some "spare" factory leather seat covers. Things that I'd have to toss otherwise. Nobody will buy 3 leather seat covers. Nobody will pay to ship some running boards. It doesn't cost me anything to store them, and next time someone cuts one of my seat covers, I'm ready though.
I'm sure that I have a place to keep some bundt cake wheels
Someday I'll run across a 300SD with the 15" wheels and swap them for the bundt cake wheels. (I prefer them anyway).
So if I was in that position I'd keep them. I'm not that normal though
It's an excuse to get one of the manual tire changers. Pull the tires, store the wheels.
-Tad