I put my tires on my counter. Have only had them fall one time... I just need room for more than four.
I strapped them down (too tight probably) a few times and had a pair hanging halfway off the shelf though.
etrack on each wall and bars across that are what I want to do. I finally did some googling and found this thread:
Rennlist Discussion Forums - View Single Post - Trailer Balance L-R that's very similar to what my buddies did. Some of them strap through the wheels some just let them ride. One of the guys is using the bars to hold a bed after he unloads the tires!