Weird bumps on TPU tubes along the seam
I'm using RideNow 700/18-32c TPU inner tubes inside 700x32c tires, with 75/80 PSI for front/rear. For some reason, when I took the tire off, I noticed these bumps/protrusions along the seams of the tube on the side that faces the rim.
Does anyone have any idea what might be causing this? Is it normal for TPU tubes, or should I be worried?
Posted Jun 3, 2026, 11:53 AM UTC
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