Kind of jump starts the pressure. When the tire is not inflated, it has holes all around the rim, its not pressing on it (as it has, again, no pressure).
He fills the red canister with air, pressurizing it, and releases all of it into the tire all at once. At the same time, the pressure hose is connected to the regular inlet. The burst of pressure from the red tube blows the tire up, fills it much quicker than the air has a chance to escape, so it starts pressing against the rim. The hose then continues filling it up.
This has a chance of working but doesn't always, here he manages to do it on the second try. I've seen it done with a little explosion before as well, where they fill the tire with some gas and then light it, which acts the same way, instantly pressurizing it faster than air can escape.
Believe it’s called a bead blaster it’s for seating the bead of the tire. Most of the time you don’t need it when you’re changing a tire. But when there’s a large side wall on the tire, it usually doesn’t have enough stiffness in the sidewall to stay up on the rim. If this happens you have to use a bead blaster to blast pressurized air in to get it to catch on the rim so it can inflate
Inflating truck tires is very difficult bc as you can see there is no seal. One way Ive seen it done is by literally causing an explosion inside the tire increasing the gas pressure which simultaneously forced the rubhber to expankd against the rim creating a seal and filling the tire with gas, thereby inflating it.
That red thing is doing something similar. It could be shooting in flammable gas and igniting it creating an explosion. It could also just be releasing gas at an extreme pressure which would have the same effect.
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u/Commercial_Attempt47 2d ago
What’s the last red cylinder ?