Bicycle Tire Valve Stem Loose. Rather than replacing the tire or having a tire or bike shop make this repair do it yourself in only a few minutes with an inexpensive tool that can be bought at most automotive stores. Tighten the lock nut at the bottom of the valve to the wheel rim.
Tighten the lock nut at the bottom of the valve to the wheel rim. Then remove the old core with a valve core tool screw in a new core just snug it up. Rather than replacing the tire or having a tire or bike shop make this repair do it yourself in only a few minutes with an inexpensive tool that can be bought at most automotive stores.
Valve stems are used to keep the air in a tire.
Then remove the old core with a valve core tool screw in a new core just snug it up. When this happens the valve stem must be tightened. Schrader valves will not fit your bike wheels. If it goes loose the noise from it rattling will ruin a ride as you try and work out where the noise is coming from.