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what is the problem when my child's mongoose bicycle has a tube that frequently has its valve broken?
it's usually broken at the base of the valve, where it meets the tube. I don't know what the problem is and how to prevent it from happening next time. I need advice on how to prevent it and which tubes are recommended. My child rides his bike to school about 1 mile everyday. I need help.
Replacing a tube is a learned skill, so don't feel bad. Check to make sure the stem is straight when re-installing the tire onto the rim. Many people miss this and have the same trouble.
As a final precaution, check to see if there are any sharp edges on the stem hole.
While the link below shows how to fix a flat, it covers the whole tube replacement in great detail. Best of luck and happy trails!
5W tube recording amp The Valve "Bimbo" 105 - 5W Studio Amp with Power Scaling