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Old 06-13-11, 07:45 AM   #1
DCwom
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700 x 35-45 tube in a 700 x 32 tire?

This past weekend my LBS (not our tandem shop) was out of 700/28-32 tubes and wanted to sell me a 700/35-45 for our 700/32 tires. He insisted that it will fit and since its a tandem its even better, because tandems and hybrids can use a thicker tube wall for more abuse (less stretching=thinker wall).

Any thoughts on this logic?
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Old 06-13-11, 08:33 AM   #2
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Should work, watch out you don't pinch the tube when you install it. A modest amount of air helps this. It'll be a few grams heavier, but if you're running 32's you probably aren't counting grams too much. FWIW you may find a lot of difference in tube sizes, whatever is marked on them.
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Old 06-13-11, 10:38 AM   #3
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In theory should work fine.
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Old 06-13-11, 11:03 AM   #4
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Should be fine .. you could even go the other way (like put a 700x25 tube) and it's likely no one would notice
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Old 09-01-14, 07:31 AM   #5
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that's good to know that the 700 x 35-45c tube will fit a 700 x 32c tire as I am in the same boat. I have a 700 x 38c tires but I want to replace them for 700 x 32c tires as it gets less resistance to road. I also will order a couple of 700 x 28-35c tire liners to add to equation.

I was wondering if I could go as low as to get a 700 x 28c tires, will the 700 x 35-45c tubes work with them ???
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Old 09-01-14, 01:39 PM   #6
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Using an oversize tube makes it more likely to get it trapped under the tyre bead on installation. This can blow the tyre off the rim.
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Old 09-01-14, 02:05 PM   #7
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Using an oversize tube makes it more likely to get it trapped under the tyre bead on installation. This can blow the tyre off the rim.
I'd use it if that's all that I could get at the time. Given the choice, I'll use a slightly undersized tube rather than one that's a little over sized.
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Old 09-01-14, 03:31 PM   #8
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I'd use it if that's all that I could get at the time. Given the choice, I'll use a slightly undersized tube rather than one that's a little over sized.
I'd go the other way. As long as you are careful on the install, I see no downside to an oversized tube. I think the undersized tube, particularly if it's well undersized, is more likely to flat as it's stretched more once inflated. But in either case, it's a pretty small effect.
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