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I have presta valves, and I got tubes with green goo about a year ago. I didn't ride my bike a lot, but I'm riding it more now, but the rear tire can't inflate or deflate. It's full enough that I cant get the wheel tire off the tube, but flat enough that it's hard/dangerous to ride. I'm thinking the green goo clogged up the valve somehow, but I'm not sure how to fix that. Is there a way to get the tire off the tube while it's still mostly inflated? I have thought of trying to poke a hole in the tube somehow, but I can't lift the tire away to do that.

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    With a pair of pliers you can (sometimes) unscrew the inside part of the valve. Then, if necessary, poke a wire through to clear out some of the goop. bicycles.stackexchange.com/questions/35083/… – Daniel R Hicks Oct 18 '17 at 21:56
  • It does unscrew? Is it removable. – paparazzo Oct 18 '17 at 22:01
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    Most likely, you're going to end up getting a new tube. And don't slime (goo) it unless necessary (most people are better off with a good tire and a regular / extra thick tube). And proper tire inflation. – Batman Oct 18 '17 at 22:59
  • Your best option is to flat the tube. Hammer a fairly slim nail through a fat part of the tyre (ie through a lug) then pull the nail out. Tube will loose air, then you can take the tyre off and the tube. Fit a new tube and inflate like normal. Tubes are cheap and consumable. Doing it this way saves the tyre, which are worth 5-10x the cost of a tube. – Criggie Oct 19 '17 at 8:31

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