I just came back from riding, and boy did it suck. I’ve had this happen about twice before, and I was wondering if there was anything that could be responsible for it: My tube pushed my tire out, it also happens at odd times, when I’m just riding. I was going from one trial line to another (about 1km apart), and halfway there I almost fell smack on my face because the tire had hit my frame. My rim is slightly (Really minor) bent, but I’m not sure if that’s to blame. I’m running a Creepy Crawler tire and a Continental tube. The last Continental tube I had had two spots where the tube seemed slighty constricted, resulting in a small bulge in between the two constricted areas. I changed this tube because I thought it might have contributed to the pushing out, but it happened again. I havn’t checked for constricted areas on this one yet, but I will.
Never happened to me…
You should take care that the tube is inside of the tire. It often happens that the tube isn’t, so that there’s tension between tire and tube. Like somewhere the tire pinches the tube. After a while the tube will push out the tire.
Maybe it’s an explanation, maybe not
I’m in the Netherlands, and it IS a bit chilly out now (around 0 degrees C). I might consider changing to another tire, but I still have one Creepy Crawler lying around, so I think I’ll go change the tube first, and check how bad the little bend in the rim is. The uni came with a Creepy Crawler tire by the way, so the rim/tire combination should be OK.
I’m not entirely sure about my pressure, I think I’ll go check that out.
Ok, I think I’ve found my problem. First off, I took a good look at the tire and noticed that it kept coming off at the same place, regardless of where it was on the wheel. Then I disassembled my unicycle and took a good look at the spokes. I noticed some of them were slightly loose, so what I think happened is that the first time the tire came off, the wheel was slightly oval from jumping (remember, the spokes are loose, so the wheel deforms easily), and stretched the bead. Every time after that, the tire just wriggles itself loose because of the stretched bead. I’ve now taken the wheel to a b*ke shop, so they can fix the tension on the spokes, and fix the slight bend in the wheel. Should be done tomorrow. If the problems persist, I’ll buy the new Monty (20" x 2.7"), and a new tube. That should fix it.