broken presta valve confusion Not a big bike person so my information could be wrong. My bike tire leaks air whenever I fill it and I know its coming out of the valve hole. I did some research and found that its a presta valve so I looked up how to replace it on youtube and for all of the videos the smaller threaded part is a separate piece from the larger diameter part but mine is all one piece.
Is there any way to fix this or do I need a whole new tire/wheel?
Thanks!
The valve is broken.   You need a new inner tube.  A new tube will cost $5 to $10, and most bike shops will charge $5 or so to change it for you.  It's something you need to be able to do anyway. They'll probably show you if you ask.