I had a tire break the bead this winter and got it fixed. I was wondering if I should store it sitting on the tires like I normally do or jack it up off the floor? I don't really want to have the tire go flat and ruin it eventually. I have a Troy Bilt Storm 2410 and was wondering if I stored it with the tires off the ground, should I put blocks under the axles, belly pan, or a combination? If I put a 4x4 under the belly pan, the tires come about 3/4" off the ground. I just don't want to cause any kind of damage by using a 4x4 where it is. It basically is running from tire to tire right under the axle.

Don't think the weight of the snowblower sitting on the tires is that much of an issue on going flat. I'm sure you had the sub-zero temps as we did here and what usually breaks the bead is the cold temperatures, the steel wheels contracting a little and the tire rubber getting cold and stiff and not sealing well at the rim/bead. Maybe without weight they would keep a better seal at the bead but I kind of doubt it but I guess worth a try? If you have ever tried to mount and dismount a really cold motorcycle tire with a small set of tire levers on a frozen ground it is tough. Even on a warm day I'll lay the tire in the sun and flip to get the bead a little more flexible. I think the tire bead sealer compound stays a little more flexible than the tire rubber in really cold temps, maybe that will help?

Could be the tire is dry rotted and is leaking through the sidewall, then the bead let go. I saw it all the time when I was repairing that kind of stuff. I used to put inner tubes in for customers. Easier than constantly filling a tire with a leaking sidewall, and cheaper than new tires.

Edit: I wouldn't worry about propping it up.

i live in Milwaukee Wisconsin area. so i usually do need a snow blower about 5 times a year. used it 1 time this year..
for the last 15 years when i store my snow blower i do only 1 thing to it for storage.
i installed a shut off valve for the gas. i turn off the gas to the carb and then start it. run it until it dies so there is no gas in the carb. i leave the gas in the tank, it's usually about 1/2-3/4 full. . put a cover over it and don't touch it until next year.
new year about the end of October. i check the tires to see if they are up to pressure. top off the tank with fresh gas. turn on the valve to the carb and start it.
i have a craftsman blower with a 9hp motor with what they call power steering. it's about 20yo. still on original tires. i did change the belts at about the 10 year mark of my ownership. still worked just fine. i also changed the friction drive wheels that power the wheels. they were starting to slip.
i also make sure i have extra shear pins, 1/4"X 1" regular bolts with nylock nuts, for the augers that turn the snow into the blower part. i usually break 1 or 2 a year.

My MIL's mower used to always go flat because of mesquite thorns. Finally, the shop talked her into filling the tires with foam. No more flats. Might be an option?

I'm in NH the same area as Mr T. I don't do anything speciàl storing my blower either. Gas gets Seafoam and it ĝets parked in the storage shed. Gets pulled out in fall, usually starts in 2 pulls. 15 yr old Simplicity

I NEVER, EVER have an issue with the tires going soft or flat or losing any air and that's been now for DECADES! Here's my secret and no my son doesn't check or service it they just never need air.

I have a 20 year old MTD 10hp that has had flat tires for nearly its entire life. I get as good a traction as I probably would with chains.

I've had the snowblower since 2008 or 2009 and this is the first year I had a tire issue. The tire that broke the bead was in good shape, just broke the bead. The other one was real low, but looked good and felt good when I pushed on it. I'll park it as is this year and check the tire pressure once in a while. I think the tires just got low with the temperature change and I neglected to look at the psi and went by feel.

Once my snowblower tires start leaking air they get tubes.

This did just remind me tho that my garden tractors have leaky tires. I should really check them.

We have had 3 snow blowers over the last 20 years (the first two were bought used and each of them lasted 6 or 7 years) this "new" blower is about 4 years old now. I don't recall ever having a problem with snow blower tires before. A few times I've had to air up the tires, but there has not been an issue after that.

I suspect the tire that broke loose at the bead was likely low on air and it being in use probably caused the bead to unseat.

Mower tires that need to be inflated before every mowing get tubes.

On a snow blower, the skids the front rides on and the wear plate at the bottom of the blower entry are more important then the tires. The tires are primarily used to turn the mower and move it along, the skids and the wear plate are to protect the bottom of the intake shoot and are designed to wear.

I've never had a tire on a snowblower go flat sitting in the off season that I can remember. My current Toro is 16 years old and I don't think I've ever added air to the tires.

Now wheelbarrows, that's a different story, I just finally bought a solid tire for it because I'm tired of dealing with a flat.

I did that two years ago and went back to a pneumatic tire when the solid tire came off the rim.

Tires on all my equipment go very low or flat over time. Even my compressors tires LOL. Fix a flat was pretty much worthless. I changed the tires with new once and they started losing air on those shortly too. I just air them up before I use it or take it out. No biggie. BTW, I love my Dewalt handheld compressor https://www.amazon.com/DEWALT-DCC020IB-20V-Inflator-Bare/dp/B07H39S9JQ

Yes, the tires on my compressor, generator and other items will not hold air for long.