I made a rack that holds tires in an oval like a long skinny auto racing track. Roughly 33 1/2" by 7". Holds about 20 tires. I put a gap in the center so you can drop a middle tire into the gap and easily work it past the rest to get it off and leave the rest undisturbed. Tires aren't "stretched" but do have all wrinkles and creases pulled out. Hanging in the garage out of any sunlight. My guess is that tires stored there should last until the rubber fails from ozone. (Plenty of powered shop tools but no house-hold motors or pumps. No engines of any sort,)
Now I just have to start building some more wheels to put them on. I'd like to have two pairs available per bike. GP4 and GEL330 or older Arc en Ciel. Biggest tire (or 28c+) that the bike can handle and a sweet and fast lighter tire. Sadly, one bike is stalled because that bike needs a rim with a deep sidewall. I picked up several Mavic CXP30s but the seller has misplaced the special washers they need for the spokes (and when Mavic announced the retirement of that rim, he bought all of Mavic's stock). So if anyone here has 64 or 96 or so of those washers lying around and generally getting in the way, I'll take them off their hands. (For the TiCycles fix gear of my avatar photo. I slide the wheel the entire length of the dropout to run from 12 to 14 teeth. Pad height relative to the rim changes a lot. Velocity Aeros have just enough depth to work. (No accident. The dropout angle was chosen so they would work.) GP4s and the like needn't even apply for the job.
I could cuss out the seller but he has done a lot for me. I knew what I was getting into and he added (at real cost but peanuts vs value) a pair of GEL330 wheels he built for his step daughter to take to the track nationals. Gorgeous gold Japanese track hub, double sided (I'd have to go out and look to recall the name but absolutely top of the line) built by a master wheel builder (him) with spokes tied and soldered perfectly. They've been ridden but never seen either pavement or a brake shoe. I'll be desecrating them taking them on the road, but I'll also be riding them in honor of a woman I consider a warrior and almost a sister. I've both watched and heard from her step dad how hard she worked to return to top form after nasty crashes. (I've been there.) She's retired from racing, the velodrome has been sold and will be ripped up. Her step dad's retired. And her wheels will go on under someone who knows what they are and cares where they came from. I think the gods will approve. (I've got Corsa Speed 25cs to glue on. I think they'd approve of that also.)