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Self-sealing tubes are filled (well, not completely filled) with a sealant, similar to this used to seal tubeless tyres. When a wheel is spinning, sealant is distributed evenly around the tube, and when the puncture occurs, the sealant should be able to stop the air from leaking. They are quite reliable for small punctures (say, up to 5mmm at a time) but the ...


Liquid Nitrogen boils at -196 Degrees Celsius (321 degrees Fahrenheit) and is cold enough that rubber will become brittle. Its probably not a good idea as I am fairly sure the the brittle rubber tube will not hold the pressure created as the liquid Nitrogen boils. View before you do it. and if you decide to go ahead, ring the emergency room before hand ...

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