How do you tighten a valve stem on a tire?
How to Tighten a Valve Stem
- Turn the valve stem clockwise as far as you can with your fingers.
- Hold the valve stem while you turn the valve tool clockwise onto the top of the valve stem. This action will attach the valve tool to the valve stem.
- Continue turning the valve tool clockwise until the stem is tight.
Can you fix a broken valve stem?
If the valve stem is leaking, you can easily fix it yourself with a valve stem tool. You only need a valve core tool and a package of new valve cores (both inexpensive). Then remove the old core with a valve core tool, screw in a new core (just snug it up; it’s easy to strip the threads), and then refill the tire.
Can all Presta valve cores be removed?
If the Presta valve has a unified body, then the core isn’t removable. In case of malfunction, you will have to replace the entire inner tube. The image above shows a non-removable valve core.
Can you replace a Presta valve with a Schrader valve?
You can put a Presta-specific tube in a rim drilled for Schrader valves, but it’s not advisable for anything more than an emergency fix. Tubes and tires tend to move slightly on the rim. In the wider Schrader hole, a Presta can move around enough that the rim will actually cut the tube at the base of the valve.