yo y mis circunstancias: Como montar neumàticos tubeless quemando gas , tamaño grande y bici

miércoles, septiembre 03, 2014

Como montar neumàticos tubeless quemando gas , tamaño grande y bici

Ultimate Bike Fails Compilation 2014 || FailWinDaily

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You can shoot butane gas into a tire that’s come off its rim. After igniting it, it gets surked onto the rim by creating some sort of vacuum, I presume.You can use non-aerosol fuel, too, although you risk melting or burning the rubber.Of course, sometimes it all goes horribly wrong

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I know an easier way. I worked in a tire shop for years before I decided to go back to college (got kicked out the first time around).

1) Have a nice long air hose with the kind of end on it that locks onto the valve stem, like you see on most bike tire pumps and Coates machines.

2) Pick up the tire, with the air line attached and your foot on the air supply pedal.

3) Bounce the tire off the floor, turning on the air just before the first time it hits. If the bead doesn’t seal on the first bounce (with practice, it will) and you aren’t skilled at dribbling a mounted tire basket-ball style, catch it on the up-bounce.

4) Repeat step 3 until the tire seals.

I don’t think I’ve ever seen a bicycle tire that was difficult to seat the beads on by pumping the tube full of air. Presumably you could use it on a hard to seat tubeless bicycle tire – something I’ve never seen in the wild. Note: this isn’t a way to inflate a flat tire – it is a way to get a tire’s beads re-seated. Your run-of-the-mill flat tire usually hasn’t had the bead seals broken. With a flat tire, you have to find the leak that let the air out and fix that. With a busted bead, your leak is visibly obvious – the gap between the tire bead and the rim is a dead giveaway. Seal that gap – by re-seating the bead – and you can just pump it back up. Unless, of course, there is another leak.

Seating the bead is much harder than just pumping the tire up. Shops tend to use a nice-sized (say a bit larger than your average 20-lb propane tank) compressed air “surge” tank with a larger diameter hose leading to the tire valve chuck. The surge tank is important – unless you have a really good bead seal you’ll never get the tire seated just on shop pressure. Learned that one by running the shop’s big compressor storage tank empty… The surge tank and large air hose allow a “burst” of pressure to go into the tire, replacing air faster than it can leak out around the beads. This then pops the beads up against the rim and after that you put the valve back in and inflate normally.

You still need a source of compressed air to re-fill the tire after seating the bead, either conventionally or with shop methods – though with shop methods you can sometimes be quick enough with the valve-stem core install tool to keep enough air in.

A few tips: Always remove the valve stem core before attempting this sort of remount. Otherwise the risk of tire explosion is much greater. I think “the Tong way to fit a tyre” omitted this step, due to the lack of whistling through the open valvestem. Do not put your finger over the valve stem after the “bang” to try and keep the tire inflated – not only will the hot gases trying to escape burn your finger, they won’t keep it full as they cool. Always wait a bit before commencing re-inflation, especially if you used a lot of fuel. Introducing fresh air into a hot, fuel-rich environment can cause a second explosion while you are much closer to the tire…

Another way to seat the bead, that does not involve fire, is to put a ratchet strap around the circumference of the tire and cinch it down tight. This makes the seal against the rim a lot better and can make it possible to inflate the tire enough to get the beads seated. You’ll want a lot more soapy water on the rim, though, to minimize the friction of the bead so it doesn’t take too much pressure.

http://gadgets.boingboing.net/2009/02/01/video-gallery-how-to.html

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