"Lookout! The tire can blow up!"
"Yeah, we better cover it with some thin plastic" 😁

Extra bonus to have a hot tire to melt the snow as you drive.

I would have calculated the foam volume so you dont need relief holes.  You know the expansion ratio of the foam.  You can measure the volume of the tire.  If you calculated the right amount of foam to get 3 times the tire volume, you'd (theoretically) end up with 3 bar in the tire.  You wouldnt need the relief holes, and the final pressure would be a lot closer to a normal tire.

You may also want to check the difference between using closed-cell foam instead of open-cell.  Open-cell has paths that allow the trapped air to escape.  It'd be interesting to see!

Do the math if it expands 17 times figure out the cubic feet inside the tire and put 1/17 of that number inside the tir with no releif holes

We have been foam filling tires in the USA for decades. mostly on certain construction equipment, hand carts, and rolling shop tools.

I would suggest tilting the tyre too, so that foam fills it completely, from the lowest to the highest.

Oh and you can fill the tyre to 3 bar safely, or 300 kpa

Use gyroscopic forces to spread the liquid while it is setting. Specifically centripetal force like a centrifuge.

Maybe put the Lada on the hoist and use acceleration to spin the wheel while wet. No air pockets and even spreading

Fill the tire with small nails. That way when you run over a nail the tire is used to it

Just wanted to say thanks for all the crazy stuff you guys have done in 2022. You've certainly made me laugh on a few occasions! Happy N ew Year to you all,all the best for 2023.

That seems to be open cell foam. You need closed cell foam.

here's a puncture proof idea to try.
at the beginning of Mad Max: Fury Road, you can see that Max filled his tires with straw and then tied them back together using wire. kind of like sutures.
how about giving that a try?

Finally we found something that actually worked! Bravo, market these and sign me up!

There's a foam fill that's used on some heavy machinery.   We owned a skid steer loader that had foam filled tires.

Fill one up entirely with casting (mold) grade silicone

Only a boss will promote their merch whilst wearing a north face hoodie

Tire innovation is born by garage 54, hooray!

you should take some 2k silicone and mix it 50:50 or so with styropor balls for the filling :)

I would be more curious what would happen by adding more Schrader valves all around the center of the wheel, then remove all their valve stem cores so that you have no holes in the tire other than the stems. Fill it with the foam thru the bottom valve steam and spin the tire so that the foam centrifuges to the outside of the tire. Let it harden, and then add more foam, and spin it some more. You can then add the valve stem cores back to the tires after it all mostly solidifies with very little air pockets inside. You should be able to then air it up using the Schrader valves and the tire should still be pretty much puncture proof as the foam would act more like stop leak.

Back in the day, tires used to have inner tubes, wouldn't it be a great come back to fill the inner tube with foam, allow the tube to protect the rim from goo, so when the tread is gone, you only need new tires instead of rims and tires. Perhaps have the instalation rotate on a spindle as it expands, the inner tubes may already have no air in them that needs to be expelled.