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Inner tube sizing

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  • January 10, 2020 at 5:27 pm #30392
    cyclefaster

    I recently switched to 32mm tyres and after looking for some replacement tubes noticed that this seems to be either the maximum or minimum size for the continental tubes I was looking at (25-32 or 32-47)

    Made me wonder which was the best size to choose if you’re looking for 32mm.

    Any advice?

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Viewing 7 replies - 1 through 7 (of 7 total)
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  • January 12, 2020 at 3:56 am #954615
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    Mr Pennington

    Go with the larger. The 25/32

    Go with the larger. The 25/32 tube will be thinner when inflated to fill a 32 tire but not the 32/47.

    January 11, 2020 at 4:06 pm #954613
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    Master Bean

    You’ll want the 25-32. I have
    You’ll want the 25-32. I have 25mm tyres and use the 18-25 size. The 25-32 are too big.

    January 11, 2020 at 3:09 pm #954611
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    TheBillder

    For what it’s worth (given

    For what it’s worth (given that you’ve made your decision) I have the larger tubes and use 36 mm CX tyres in the winter and 28 mm slicks in the summer without any problems at all.

    January 11, 2020 at 1:30 pm #954609
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    cyclefaster

    Not really worried about it,
    Not really worried about it, just curious which size people might chose if your tyre size is the cut off point. Decided to go for the larger ones.

    Welsh boy wrote:
    Have you ever inflated an inner tube not in a tyre?

    I dont see why a smaller inner tube would fail to fill a tyre larger than it’s recommended size, I think you are worrying about nothing.

    January 11, 2020 at 11:15 am #954607
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    Nick T

    Usually not a problem using a

    Usually not a problem using a narrower tube,  but if you patch a puncture on it then besr in mind that you’re asking the tube to do even more stretching around the solid patch. Also, you “may” be more susceptible to punctures the more you inflate the tube, think about popping a balloon with a pin when it’s full of air compared to one half deflated. This is why tubulars are less prone to flatting, the inner tube is essentially the same size as the tyre, which also leads to a less rigid inner tube and more comfortable ride

    January 11, 2020 at 9:45 am #954605
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    Welsh boy

    Have you ever inflated an

    Have you ever inflated an inner tube not in a tyre?

    I dont see why a smaller inner tube would fail to fill a tyre larger than it’s recommended size, I think you are worrying about nothing.

    January 10, 2020 at 7:19 pm #954603
    0
    ktache

    If your frame can take larger

    If your frame can take larger tyres, and you could be thinking of eventually getting fatter rubber, go for the larger size.  If the only possibility is for going thinner or staying the same, get the narrower ones.

    The smaller tubes probably are slightly lighter, don’t know how important that is to you.

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