If I have the diameter of the rim of my bike and also have the width o this rim, how can I determine which tire is good for me?


1 Answer 1


Measure the diameter of the bead seat (i.e. the place where the tire bead will sit). It will most likely be one of these:

  • 559mm = MTB 26 inch tire.
  • 622mm = 700C (a.k.a 29er)
  • 630mm = 27 inch that is old enough to remember the Bee Gees.

If it's not one of those, look it up here: http://sheldonbrown.com/tire-sizing.html#iso

The new tire will have a marking on it like 28-622. That second number is the diameter.

  • 1
    Also 650b (584 mm) is making a comeback.
    – Rider_X
    Commented Nov 26, 2014 at 22:39
  • 28-622 the first number is the width in mm!
    – Carel
    Commented Nov 27, 2014 at 8:40
  • But note that the tire width is greater than the rim width. Commented Nov 27, 2014 at 14:16

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