What if I fill liquid nitrogen in tube of two wheeler?? Is it OK?
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 and book yourself a bed.
If you mean filling tires with pure nitrogen gas, refer This question