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Jan 17, 2023 at 14:22 comment added Jahaziel I have been using a 700x38C tire with an 700x23 inner tube inflated to 40-60 PSI and it was very fiddly, constant flats. At least one tube failed at the valve junction and another tube of the same size lost pressure down to not ride worthy in about 2-3 hours even not having and obvious puncture. I solved my issues installing a 28x1.9 inner tube. It holds pressure above 40 PSI for at least 16 days and counting...
Jan 16, 2023 at 13:38 answer added Filipino Biker timeline score: -1
Apr 20, 2021 at 20:05 comment added cyanrarroll I would also add to all these answers that if the narrower tube is paired with cheap tires that you will have to be topping off their pressure more often because air can more easily permeate out. For going fast, narrower tubes are lighter but with that mindset you might as well buy even smaller tubes and do "ghetto" tubeless.
Apr 20, 2021 at 12:42 comment added Weiwen Ng This is only worth a comment because the question's already been answered correctly. If you are using superlight butyl, latex, or thermoplastic (TPU, e.g. Tubolito) tubes, I'd be more wary of stretching the size specs. For light butyl, you're stretching the tube more than it was designed for if you use an undersized tube, and this might compromise the structural integrity. Latex may be able to stretch, but it is somewhat porous, so I'd be a bit more cautious here. I'm not sure if the material properties of TPU allow this, and those tubes are expensive.
Apr 19, 2021 at 23:41 answer added Banjo timeline score: 0
May 18, 2020 at 1:45 answer added Paul timeline score: 2
Nov 13, 2018 at 8:57 answer added user40184 timeline score: 0
Jul 5, 2011 at 21:11 answer added Daniel R Hicks timeline score: 10
Jul 5, 2011 at 15:12 vote accept Tom77
Jul 5, 2011 at 14:20 answer added zenbike timeline score: 5
Jul 5, 2011 at 14:19 history tweeted twitter.com/#!/StackBicycles/status/88250758050484224
Jul 5, 2011 at 13:23 answer added ʍǝɥʇɐɯ timeline score: 23
Jul 5, 2011 at 12:53 history asked Tom77 CC BY-SA 3.0