Valve extenders - how do they work?
I got some latex tubes, with short valves that I want to use with my 404's. So got some valve extenders to go with them.
These:
https://www.amazon.com/Vittoria-Late...ds=latex+tubes
The problem is that once I take out the valve core and put on the valve extender, nothing is stopping air from coming back out..
What am I doing wrong??