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  1. #1
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    do people at the same height get the same size of bike?

    My brother is slightly taller then me but he has long legs and I have shorter legs. Would we need different sized bike or the same?

  2. #2
    Senior Member CNY James's Avatar
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    he probably could ride your bike and have better results than you riding his but if his inseam is longer he should get a bigger bike.
    I'm running into the same thing with my brother, he is a little bit taller than me (maybe an inch or 2) and his inseam is a little longer than mine.

  3. #3
    umd
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    Height is probably one of the least important things in sizing a bike.

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    At least for me, the length of my torso is more relevant than the length of my legs. I've got short legs for my height. You generally have more flexibility with seatpost height to compensate for leg length than you do with reach to compensate for torso length. Once you start changing stems to compensate for reach, you change the steering response and handling. So, to respond to your original question, no, same height does not equate to same frame size.

  5. #5
    Senior Member DieselDan's Avatar
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    Inseam to the floor may be the most important measurement when fitting a bike to a rider. Women tend to have longer legs in relation to their height then men. When I did bike rentals, many times I had couples that were the same height, but the woman needed to have her seat higher then the man because of that physical trait.

    Another example is my own father-in-law. He is 6'4", but has the same inseam as me at 5'7" of 28"! Poor man cannot ride in a car, he must be in a pick-up, SUV, or van. He does not ride a bike at all, but always hated because of his odd proportions.
    Last edited by DieselDan; 01-07-10 at 08:05 AM. Reason: Cold induced mispelling.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  6. #6
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    So, she just willed her legs longer, is that what you are saying? Word is physiological

    But I would agree, height is much less relevant than leg, torso, and arm length.

    28" inseam at 6'4"?!? Damn that sucks...I think he would need a custom bike to have one with a long enough top tube to accommodate his torso length

  7. #7
    Banned. Mr. Beanz's Avatar
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    MFG'ers sometimes measure differently. Some measure center to center form the tubes, some center to top so even bikes labeled the same can be different in actual size!

    Geometry can also be different. Some MFG'ers might prefer a longer top tube, some a shorter.

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    Everyone is different. Some have a tall torso for their height - which means their legs will be shorter. And the same goes the other way. Get the bike sized for YOUR body before you purchase.

    One nitwit bike-shop said they didn't need me to be sized. Lord knows what I'd have would up with if I didn't size myself.
    How do you keep an idiot in suspense?

  9. #9
    Older than dirt CCrew's Avatar
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    Quote Originally Posted by DieselDan View Post
    ..but the woman needed to have her seat higher then the man because of that psychological trait.

    ...
    So it IS all in their mind!!

  10. #10
    Senior Member wahoonc's Avatar
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    Quote Originally Posted by slipknot0129 View Post
    My brother is slightly taller then me but he has long legs and I have shorter legs. Would we need different sized bike or the same?
    Not necessarily...as has been pointed out. I have a brother that is 2" taller than I am, but has shorter legs. He rides a 60-62cm frame I ride 65cm with a shorter stem than he does.

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  11. #11
    Senior Member DieselDan's Avatar
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    Quote Originally Posted by CCrew View Post
    So it IS all in their mind!!
    Spell check be the death of me! I fix it.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  12. #12
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    I've owned three different bikes, each different sizes and models. Each time I would spent a lot of time looking over specs and trying to find the perfect bike. In the end, what only matters to me is the right standover height - everything else I can get used to.

  13. #13
    Senior Member trek2.3bike's Avatar
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    Quote Originally Posted by plutonium83 View Post
    In the end, what only matters to me is the right standover height - everything else I can get used to.

    Ditto. I ride a very short frame (Trek 43cm).

    In that size range an 1cm change in seat post height (the measurement the manufactures most often use) can produce up to 5 cm difference in standover height. A 5 to 1 difference!!!

    It is a shame but the manufacturers as a group cannot be trusted to measure consistently. Neither, unfortunately can every individual manufacturer within their own line.

    You must never buy without actually riding the frame you are purchasing.

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