When does using a lighter and lighter fluid work for tires that have come off their rims

This may sound very unusual, and highly suspect, but it works very well!  I usually use this technique as a last option when straps and other safer alternatives are not working.  I also only use this tecnique for trailer tires and lawn mower equipment.  It is also very important to note that you should only do this when the rim and tire are completely removed from the vehicle in question, as to avoid starting fires.  DO NOT DO THIS ON A VEHICLE, AROUND GAS, OR AROUND FLAMMABLE MATERIAL.

How does using lighter fluid work to pop a tire back on a rim?

In theory, this works by super heating the air in the tire and burning off gasses to fill the tire quickly and to seal the tire back on the rim.  This is very dangerous, and should be done slowly adn carefully.  Be sure to have a bucket of water, a rag, and to do this on dirt or concrete when the rim and tire are both removed from the vehicle.

Prep the tire and rim

Take the tire and rim off of the vehicle in question.  Again, I have only had success doing this with lawnmower tires and smaller tires for trailers and go-karts.  I have not tried this for cars and I do not recommend it.

Lay the rim and tire on the ground - dirt or concrete facing flat with the backside of the tire on the ground, and the frontside of the tire facing the sky.  You will need to have a bucket or water with you, a rag, and an air compressor handy.  Also, get some lighter fluid and a lighter.

Soak the outside face of the tire in water

Since we are using fire to achieve the popping of the tire back onto the rim, we do not want to burn the tire.  Tires have a very high heat resistance, but you want to avoid melting your tire.  Soak the front of the tire around the rim in water by applying around the face with a rag.

spread lighter fluid over the face of the tire and squirt lighter fluid down inside the tire

Be careful on this step.  You are not looking to start a bonfire.  Squirt a small amout of lighter fluid around the face of the tire around the rim, and squirt a liberal amount of lighter fluid inside the tire.  DO NOT LIGHT.  Instead align the rim and tire so that they are as close to center as they can possibly be.  Turn on your air compressor and have it ready to fill your tire.

Light the fluid

Now, light the lighter fluid on the top of the tire with your lighter.  This should light up quickly, so lean away from the tire and do not face the tire when you do this.  When the tire lights, the lighter fluid will burn slowly on the top.  You want to make sure that the fluid inside the tire is burning as well.  If you do not get both the fluid on top and inside to burn at the same time, this will not work.  Put out the fire with yoru rag, and try again to get both the lighter fluid inside and around the rim to burn at the same time.  You may have to do this a few times to get the hang of it.  This is not safe, and you are working with fire to do this, but it does work as a final last result.

Get the tire to pop onto the rim

If you get enough lighter fluid inside the tire and around the rim to burn as the same time, in a slow controlled burn - that is not blazing up high or trying to burn you, try to keep the rim and tire centered and aligned as evenly as you can.  If you do this right, the tire will pop onto the rim, and quickly start to expand with air as the lighter fluid inside chokes itself out.  When this happens, grab your rag soaked in water and quickly spread it over the face and rim of the tire.  DO THIS VERY CAREFULLY!  THE RIM WILL BE SUPER HOT AND CAN BURN YOU.  Also, soak the valve stem in water so that it will not burn you when you touch it.

Fill the tire with air

Quickly attach the air compressor to the tire and fill it up with air.  It should hold air, it should inflate, and it should hold a nice seal against the rim.  Now you can fill your tire up to regulation inflation, and put your rim back on the vehicle.