Tube size

hopeful
hopeful Posts: 76
edited July 2007 in Road beginners
Trying to understand tube size... Given a 700 X 20-28 tube, that means it fits anything between 20 and 28, right? How does that work then :?:

Comments

  • schlepcycling
    schlepcycling Posts: 1,614
    Yep, you're right fits any tyre between 20 and 28, sorry don't know the physics of why it works.
    'Hello to Jason Isaacs'
  • stevec205gti
    stevec205gti Posts: 366
    It's not too complicated - a tube can only sensibly stretch so much, so it's then given an upper limit. If you put it in a bigger tyre than this you run the risk of the inner tube splitting as it's over stretched. As for the lower limit, if the inner tube is too big there's too much there to physically get the tube in the tyre.

    All mentions of size above refer to cross-sectional area and width of tyre - not diameter of the wheel
    Has the head wind picked up or the tail wind dropped off???

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