Will 700x28 tube fit 700x32 tires?
08-25-21, 09:26 PM
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Will 700x28 tube fit 700x32 tires?
Hey guys, I just purchased a set of 700x32 tires and Im stocked up with 700x20-28 inner tubes. Will it be ok to use these tubes or should I buy 32s?
08-25-21, 09:28 PM
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Yes, it'll work.
08-26-21, 01:38 PM
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Probably better that they be too small than too large for the tire width. However the more they have to stretch to fill the tire, the more thinner they'll be and a puncture won't have to penetrate the tire as far to cause a flat. Maybe even they'll act more like a balloon when punctured.
But I'll be happy to use a size range smaller if that is all I have available at the time.
But I'll be happy to use a size range smaller if that is all I have available at the time.
08-26-21, 01:43 PM
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I was told by the first mechanic I worked with years ago, a little bigger isn't so bad but generally not a little smaller but I find differing opinions from different mechanics. I am sure you will be OK but me personally I would go with the correct size when you can.
08-26-21, 01:55 PM
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Think about how big you can safely pump up a tube outside of a tire -- you're only asking for another 2mm in each direction from its rated size. 
08-26-21, 01:58 PM
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Probably better that they be too small than too large for the tire width. However the more they have to stretch to fill the tire, the more thinner they'll be and a puncture won't have to penetrate the tire as far to cause a flat. Maybe even they'll act more like a balloon when punctured.
But I'll be happy to use a size range smaller if that is all I have available at the time.
But I'll be happy to use a size range smaller if that is all I have available at the time.
08-26-21, 02:18 PM
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Not accounting for any stretching of the tire which will be minimal, they will only stretch until they meet and fill the inside of the tire casing and rim. Putting more or less pressure won't make any difference to how thin it gets. Other than the minimal stretching of the tire which would happen even with your previous tube.
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