Some times when the board happen to ride onto a small stone or a nail that damage the inner tube, that you need to change to a new tube.Here is the step .
Here is the video details
1,Airless the inner tube
2,Remove the screws,disassemble the hub
3,Take the inner tube out
4,Set the new inner tube (the new tube will have a little air inside)
(Make sure that the direction is correct, right wheel and left wheel, the inflatable port 's direction is different)
5, Assemble the hub (Make sure the hub set up well, there should not be any gap between the two hubs)
6, Screw
7,Inflate the inner tube
