Tube to fit 700x25 and 700x28?

blorg
blorg Posts: 1,169
edited July 2007 in Road beginners
Hi, would I be OK with a tube marked 700x20-25 in the 28 (front) in an emergency? Having some difficulty finding 25-30s or so locally.

Comments

  • Yorkshireman
    Yorkshireman Posts: 999
    blorg wrote:
    Hi, would I be OK with a tube marked 700x20-25 in the 28 (front) in an emergency? Having some difficulty finding 25-30s or so locally.

    Should be OK. I've done it and had no problems :wink:
    Colin N.


    Lincolnshire is mostly flat... but the wind is mostly in your face!
  • blorg
    blorg Posts: 1,169
    Great, thanks, meant to mention, back is 700x25, front 700x28 so ideally looking for something compact that will fit both, my other tubes are 700x28-god knows what and are quite bulky.
  • Greenbank
    Greenbank Posts: 731
    Spesh inner tubes come in two sizes:-

    700c x 20-28 and 700c x 28-38

    So I wouldn't think there's any problem in putting something marked as 25 in a 28 tyre.
    --
    If I had a baby elephant signature, I\'d use that.
  • pieinthesky
    pieinthesky Posts: 417
    I have been using 20 - 25 mm tubes in 28mm tyres for donkeys years and have no problems whatsoever. In fact I dont think I have ever had a 28mm tube.

    I even used a 20mm tube in a 2 inch MTB knobbly once in an emergency though I doubt it would have worked if it had any patches on it.
  • Aidocp
    Aidocp Posts: 868
    blorg wrote:
    Hi, would I be OK with a tube marked 700x20-25 in the 28 (front) in an emergency? Having some difficulty finding 25-30s or so locally.

    I don't know about long term? but I ve certainly done this when out on a club run when my 28mm got a p**ture and my spare tube had failed (Specialized Valves :evil:) I borrowed somebody's 20-25, it got me round OK. :D
    Road Bike
    Sirrus
    Commuter

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