Smaller innertube in slightly larger tyre?

Johnny Napalm
Johnny Napalm Posts: 1,458
edited August 2009 in MTB general
I assume that I'll be ok to use a 1.9 - 2.125" tube in a 2.25" tyre?
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Marin
SS Inbred
Mongoose Teocali Super

Comments

  • Dowse40
    Dowse40 Posts: 102
    Can't see why not.
  • craker
    craker Posts: 1,739
    yup should be ok.

    I recently found my tyre completely flat, inner tube had split down a seam. That was 1.5" in 2.25 tyre.
  • .blitz
    .blitz Posts: 6,197
    Cheng Shin 1.9-2.1 tube in a 2.4 Nic. No problems and ghetto light =]
  • Northwind
    Northwind Posts: 14,675
    I do it all the time, never a problem, though obviously the tube's stretched a bit thinner so might puncture more easily. Weight weenie Schwalbe XXlights 2.1s stuffed inside Kenda 2.35s (which are actually 2.35 inches across, weirdly enough, so bigger than some 2.4s...).
    Uncompromising extremist
  • jazid
    jazid Posts: 33
    Does anyone know of a reason why you couldn't do the reverse

    e.g. a 1.9-2.1 Conti Supesonic inner tube inside a 1.8 Conti Fire Pro XC tyre?
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    Trek Fuel Ex 8 full susser(2008) , Trek 6700 hardtail (2004), Giant TCR 9speed
  • Northwind
    Northwind Posts: 14,675
    jazid wrote:
    Does anyone know of a reason why you couldn't do the reverse

    e.g. a 1.9-2.1 Conti Supesonic inner tube inside a 1.8 Conti Fire Pro XC tyre?

    I do that too, 1.9s in my 1.5 road tyres. 2 reasons that it's not ideal, is that they don't fit very well and they work out a bit heavier than a smaller tyre. Practically speaking, it's all about the size though, it's very very easy to pinch them when fitting I've found, or to have the tube fold or twist in the tyre. Just generally a bit of a pain. But it does work, with no real drawbacks once fitted so far as I can see.
    Uncompromising extremist
  • angrymeerkat
    angrymeerkat Posts: 134
    I was advised by my LBS that 1.5-2.1 tubes were fine for 2.3 speedkings. Seems to work quite nicely... touch wood, etc!
    Everytrail, Flickr.
  • Johnny Napalm
    Johnny Napalm Posts: 1,458
    I don't know why I posted this...I've done it on more than one occasion in the past!

    :?
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    Marin
    SS Inbred
    Mongoose Teocali Super
  • toasty
    toasty Posts: 2,598
    Yes for standard butyl, no for latex oddly :) The latex doesn't like expanding quite so uniformly, the pressure built up then suddenly one spot on it gave and steretched, pushing the tyre clean off the rim. Very odd.
    Stumpy FSR 29er
  • DVV
    DVV Posts: 126
    My take on it is that if something is going to get through your tyre, it' probably going to get through your tube and so a .1" difference or so is going ot make bugger all difference.

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