How To Fix A Bike Valve Stem. Turning counter-clockwise removes the core from the stem. The way to prevent a crooked valve stem on a bike is to keep the tires aired properly.
Different Types Of Bicycle Valve Stems. So lets start the instructable. The two most common bike tire valves found on modern bikes are schrader and presta.
That will make sure the gaps are sealed.
Any more significant damage and you should throw it away and replace it with a new one. For the begining I am sory for my bad english. The sander will need to be wider than the diameter of a bicycle Schrader valve stemYou will use this to form a hole in an appropriately sized patch ie a patch larger enough to have sufficient material on all sides of the hole. Your valve looks like a regular Presta aka french valve to me.
