Poker Posted March 18 Share Posted March 18 (edited) My inner tube seems to get the valve stem tore off of two of my tubes now. What I know is the tubes are airtight, the only hole in them is where the valve stem used to stay. I'm on my last spare tube and I need to figure out what's wrong before I put it together again. Both times I was riding straight ahead on flat ground doing maybe 15-20km/h. And I would feel on the vibration I have that my tire was flat. The first time it happened was my first time riding in deep fresh snow. The second time it happened I managed to ride about 50 meters with a new inner tube before it happened again. I purposefully had 1,4 bar (20 psi) that felt more than plenty, I'm like 90kg fully geared. Could it be my rim is cutting into the valve stem? Am I missing some sort of rubber protection that's supposed to be mounted between the valve stem and the rim hole? Am I using too much Vaseline when mounting the tire so that there is not enough friction between the inner tube and outer tire? There's a few dents in the rim and a small fracture on the edge of it but no sharp edges that I can feel and the leak is basically happening around the valve stem or the valve stem getting ripped from the inner tube. Also not important question but is there a way to attach the lose valve stems to the inner tube again or is it just trash once it gets ripped out? Edited March 18 by Poker Quote Link to comment Share on other sites More sharing options...
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