Guesswork question!

Discussion in 'Bikes and Buying Advice - What Bike?' started by Jezston, 19 May 2010.

  1. Jezston

    Jezston Über Member

    Location:
    London
    Here's a weird question. Looking at this photo, and judging from the proportions, would you say if the bicycle looks like it would be suitable for a girl of 5'8" in height?

    My friend's been given it, but by a friend of hers who is apparently only 5'3" or something, so she's not sure if it's the right size or not.
     
  2. Rob3rt

    Rob3rt Man or Moose!

    Location:
    Manchester
    Tape measure will provide the best measure. With no info on wheel size or anything then its hard to tell by proportion, at least I couldnt tell!
     
  3. OP
    OP
    Jezston

    Jezston Über Member

    Location:
    London
    I'll have to pass any instructions on the owner who knows nothing about bikes - what exactly do you measure to get the size of a bicycle?
     
  4. Gerry Attrick

    Gerry Attrick Lincolnshire Mountain Rescue Consultant

    Measure from the centre of the bottom bracket spindle to the top of the seat tube (where the frame ends). That is the frame size.
     
  5. OP
    OP
    Jezston

    Jezston Über Member

    Location:
    London
    Straight up vertically, or at the angle of the tubing?
     
  6. Rob3rt

    Rob3rt Man or Moose!

    Location:
    Manchester
    Along the tube.
     
  7. Gerry Attrick

    Gerry Attrick Lincolnshire Mountain Rescue Consultant

    Along the length of the tube.
     
  8. I've seen take diagrams which it to the middle of the top tube and vertically and the way you describe :biggrin: The former is difficult with open framed bikes :shy: my guess would be to the top of the seat stays ?
     
  9. Gerry Attrick

    Gerry Attrick Lincolnshire Mountain Rescue Consultant

    True some makers refer to frame size dimensions to the centre of the tube, referred to as C-C, but in an open frame C-T (top) has more relevance.
     
  10. jimboalee

    jimboalee New Member

    Location:
    Solihull
    20 1/2" at a guess. ( 52 cm )...
     
  11. Maggot

    Maggot Guest

    At a guess your taller friend will be too big for it. If the 5'3" rider has that much seatpost showing, then your taller friend will be having loads more out and it will be beyond the safety mark.

    Obviously the caveat here is that as neither of them know anything about bikes it will probably have been bought at a whim from a car boot and set up wrongly.

    Why don't you just go and help her get it right?
     
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