You need a "Welcome Back" ceremony...for Mr. Cotter pin.

LOVE the twisted wire "Jesus" clip holding the tire on to the axle.

Hint, fill a ballon with some of this, let it fully cure, then, flatten a spot. Does it rebound? nope, stays flattened. Might be fine for a lightweight push mower tire, but that's about it.

You could probably save the needle valve for another project and just screw a cap onto it.

I used to work for a commercial tire shop that had a foam filler for the big tractor tires. As far as expansion goes I don't know if there was that much expansion. This is due to the filler you are using is for filling cracks around doors and windows, thus the need for expansion. The foam we used was monitored with a pressure gauge and there was a needle driven into the tire opposite the valve stem for venting air. When putting the foam fill in the tire the valve stem was on the bottom and the foam introduced until it started to bubble out through the pin in the top. At this time the pressure was obtained, the pump was shut down, valve replaced in the valve stem, and a nail used to plug the vent hole. Then curing. 24 to 48 hours, depending on how large of a tire we did. And we did several rear tractor tires. And these weren't garden tractors.

When you add foam thru the valve stem with no way for the air to escape you end up with a tire full of foam and compressed air. As long as the compressed air doesnt leak out it seems to work. You have to have at least one air escape hole. If the air bleed hole is too small it might clog before the air escapes. I blew up an old tire once. Luckily it happened when I wasnt around. If you dont have a mess to clean up you didn't do it right. It still wont work for weight carrying tires.

I did this twice on my lawn trailer tires and wasted 2 cans of Great Stuff trying this. The foam never expanded or solidified. I contacted the manufacturer and was told that the product needs MOISTURE to work properly. On my third attempt, I injected about 2 ounces of water into each tire, spun the tirs to distribute the water evenly, and then re-injeccted them with Great Stuff. This worked out very well and gave me great results! The manufacturer was adamant, however, that THIS IS NOT AN APPROVED USE OF THEIR PRODUCT.

You can also drill a few holes around the tire, to let the foam expand more evenly, you don't have to remove the valve stem. (I saw another youtuber do that.)

install a TUBE (old school) ..... but foam is more FUN ! (needs a 2-part curing foam with air escape around the rim)

My tube has gone bad many times. Pain in the rear and the wallet. I'm moving wood chips around the yard with my John Deere mower trailer and have one tube that went bad and sucked up into the tire. No valve stem is protruding. I notice that even with that weight in the tractor, the tire holds it pretty well. Thinking if the tire with a blown tube can handle the weight, then a foam filled would probably work. Not a fan of how expensive the foam is and the sticky mess, but I may try it.

2-3 holes drilled in tread gives escape route for excess foam. Also lets you know if complete interior was filled.

Don't need the valve stem anymore, just put the cap on.

Wouldnt it make more sense to allow the foam to leak out until the stream stops, then replace the stem?

I've sold polyurethane systems for over 40 years and one can achieve all sorts of modulus using various chain stopping reactions. Urethanes can be light foam or and hard as a rock depending on when the reaction is stopped. The best system for this would be a soft rubbery consistency and filling the tire evenly is also desirable. Just my two cents worth. You just need to find someone with a lot of different formulas that they have experimented with for the best results. There are a few companies i've dealt with that make several different modulus urethanes.

Have the stem on the bottom side drill a small hola on top of treat for the air to scape and room for the foam to expand

How good did it work. After a few heavy loads did the tires get oddly shaped?

You are a genius

Thank you

man sounds like barrack obama, pauses and everything 🤣

when you quickly put the core in to stop the foam from coming out, i assumed you screwed it in tight, but it looks like may not have because later you showed that air was escaping. can you explain exactly what you did. do you leave the core "partially" reinstalled????

Why not just put a cap on instead of the valve stem?

Do you need to spin the tire to distribute the foam evenly? Its just for my garden cart.

Hi - What type of foam did you use - I tried it but the foam turned to rock and did not go all through the tire.....

Would this work for a wheelbarrow wheel?

cute doggie.

Does this make it harder for random folks to slash your tires?

I need to try this on my wheelbarrow if i can get the stupid tire reseated

How much foam do you put in,?

Anyone ever do this with inner tunes in tires? Like a bicycle?

Hi that's awesome I have a scooter that is what I wanted to try because of the cost

Just got done with mine, every frickin year. it sucks

Has anyone tried this on their riding lawn mower tires?

Gave up on using foam and ended up getting rid of the tires as well. Riding on rims takes some getting used to.

How do you know when to stop? Since that's expandable foam, if you put too much, do you know?

My daughter got on my Craftsman lawn tractor after it had been sitting awhile. She said those tires are not around. I will get you new tires. That was the end of that experiment. I have heard of people putting the mower on blocks between uses. I've heard of drilling.holes in the flat spot and adding more foam. Hell no.

Someone else did an experiment with different types of foam..the big gap filler works best

Why do you care if the tires go flat on a power washer ???

You pay $10 for the foam $5 for a tube umumum

If his tire was truly full of foam he would not have been able to squeeze it like he did in the video. The best way is to lay the tire on its side and drill four holes on the sidewall and then allow the foam to expand and come out all four holes. The foam can expand like it should and the excess is easily cut off from the four holes.

This wont hold up long term. It will destroy your tire. I did thi to my wheel barrow and the tire is pretty much falling apart now. You are better off using Slime. It will puncture proof your tire and keep it air filled and last alot longer.

Not a good solution. This is low-density, rigid foam. You want high-density, flexible foam like Smooth-On's FlexFoam-iT! 25.

Wait at least 24 hours... no air in there...

I tried this, it works at first and then it starts to brake down inside the wheel. I used 4 cans. Best to do it on a Hot day. Two wheel lawn cart. I still had to buy myself 2 new tires. The price of those cans are not worth it, 4 cans + tax= 1 tire from Harbor Freight.

I pissed away a lot of time and money trying to do this on a Craftsman lawn tractor. This kind of foam can't handle a load for very long. The lawn tractor can take Chevy wheels. The thicker car tires dont pick up hedge Thornes so bad. I will be getting flat free tires for the front. I have a couple of 8 inch tires that have been filled at a heavy duty tire shop. If I use them I will need to weld in different wheel centers. Not sure what is in the professional filled tires but they are very heavy.

Buy inner tubes . Foam only works until the tire rotates under load

You filled it with more compressed air then anything.

air doesn't help any reaction with this stuff. For polyurethane moisture does.

After a while the foam will start breaking down. I recommend not using it either put a tube in it or replace the tire.

Water (NOT “air”) activates & accelerates the set-up of the foam. It’s the humidity in the air that activates & accelerates the setting up of the foam not the air: it doesn’t air dry....smh Might consider putting some water inside the tyre first, swishing it around PRIOR to filling it with foam. Big Gap is the best. Not the window & door. Not the regular stuff either. You’re welcome.

Are you kidding me?

Please don’t do this this is the stupidest thing I’ve ever seen...

First of all your filling foam in a tube. It’s not a tub less tire. I would like to see it done on a tub less tire 🛞

Please don’t bad advice ! Save the great stuff for insulating your house, just put a tube in tire they make heavy duty! no mess ,toxic stains on hands or waste of gloves, no waiting around , carry the full load and offers air suspension🤣 I have used old tubes to line the tires with holes worn right through, then inserted a tube in no problems. don’t be lazy and fix it right when are you gonna have time to do it again?