Cycling Equipment · Public discussion

Frame size

Started by Brad Behm · · Last activity · 7 posts · 2,021 views

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Cycling Equipment
Published
29 February 2004
Last activity
3 March 2004
Original author
Brad Behm
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7
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  1. What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    Thanks,

    Andrew

  2. Quoted post said:

    Originally posted by Brad Behm
    What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    Thanks,

    Andrew

    Will need more info in order to get you properly sized, (Why not try your LBS?) but you can try this site for starters:

    http://www.parktool.com/repair_help/roadposition.shtml

  3. Brad Behm said:

    What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    Thanks,

    Andrew

    You should get the frame size that is recommended by a quality bike dealer who takes the time to fit
    the bike to your riding style...

    Really, there are many variables. For example, my legs are short in proportion to my overall height
    (I am 5'8 and have a 53cmm c/c and a 55 cm c/c frame, both of which fit in their own ways). And
    different manufacturers use different ways of measuring. And different people have different
    'philosophies' of bike size. But to start-

    sheldonbrown.comframe sizing.html

    coloradocyclist.combikefit

    A short discussion of the major frame measurements-

    citybikes.comframe geometry.htm

    And be sure to read this one-

    chainreactionbicycles.comroadbiketestrides.htm

  4. Brad Behm said:

    What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    1) Top tube length is more important than seat tube size, within reason. You need to try out a few
    bikes as the frame angles will affect how much top tube you need. You should end up with a stem
    at a sensible length of 10-14cm if the top tube length is correct.

    2) If you have average length legs for your height then a 58cm seat tube should give you adequate
    clearance for your 'nads, and is a good starting position. If the frame is one of those currently
    trendy compacts [1] try and find what the "virtual" seat tube size is, or take a tape measure and
    measure from the BB centre to where a horizontal top tube would be.

    [3] I'm pleased to see that Cannondale and Look still make "proper" looking race frames ;-)

  5. brad-<< What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    Quoted message said:
    Quoted message said:

    <BR><BR>

    Road frame sizes, like a '58cm' varies a lot from manufacturer to manufacturer. The only dimensiopns
    that mean anything is top tube LENGTH and seat tube ANGLE, neither of which are included in a
    frameset's 'size'. a measurement of the seat tube length.

    It's like describing a shoe size but counting the number of holes for the laces.

    GO to a bike shop with a fit cycle and person to determine your femur length, which will
    determine seattube angle, and your arm/torso lengths and flexibility which will determine top
    tube and stem length.

    Formulas that use inseam are mostly meaningless.

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali costruite eccezionalmente bene"

  6. Brad Behm said:

    What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    I'm 6'2" and have De Rosa 57cm. The frame has 57cm t-t seat tube and 57cm c-c top tuve with angle of
    73 deg. With a stem of 12 cm my overall reach is 69cm and that is just what I need. BTW My leg
    inseam is 90 cm. Every calculator that I tried on the net said I need around 59cm c-c frame, and
    that my overall reach is 69cm. Based on that I have chosen to buy a little bit smaller frame to have
    it as stiff as possible and still have that 69cm with a use of longer stem. That's not I would
    reccomend to you, but it works great for me....my ride is a joy 🙂)

    When my comutes ask me about advice about their sizing this is what I say:
    1)Mesure yourself. I have found the fit calc on this site to be the best:
    wrenchscience.comdefault.asp
    2)overall reach and frame size from this site are great starting point I wouldn't play much with
    overall reach instead you already know what size you need. In case you don't I would reccomend the
    size of the frame that is 10-11cm shorter of that value. Why? Because 10/11 cm stems are in the
    middle of production line and it will be the best starting point if it happenes that you need
    longer or shorter one. If you buy a frame and have 14cm long stem in the start there just isn't
    any room left for longer one. Now check the geometry table of frames you wonna buy and find out
    which size has top tube lenght in that size. For sloping frames check the effective value. For
    frames with big seat angle you might consider a little bit smaller frame because it will effective
    be longer. Usual angles for traditional (non sloping) frames are about: -75 deg for small frames
    (smaller than 50cm aprox) -74 deg for middle size frames ( 51-55 aprox) -73 deg for large ones
    (56+ aprox) These values are aproximative.
    3)By now you should be able to determine the right size of your new frame. If you are racer and need
    stiffer and lighter frame go for 1-2 cm smaller frame and adequat longer stem. For more comfort
    you might consider 1 cm bigger frame, but I would rather buy the one of right size 🙂)
    4)finally...try the bike in the shop...everything above was just the theory that might not work for
    you. This is the most important step and don't hesitate to make few changes to setup so you can
    find the best ride 🙂) I have seen ppl riding too big frames and the ones riding too small
    ones....usualy they were not aware of that and thought they have a great body position....so who
    are we to tell them different. But in general I think that too small frame is worse choice than
    too big that is not great choice either 🙂))

  7. "Brad Behm" <[email hidden]> wrote in message
    "]news:[email hidden]...

    Quoted message said:

    What size road frame should I get? I'm 6'1". 165lbs. if that matters.

    Thanks,

    Andrew

    Have you tried a 32-36 double D?

    Seriously, this is one respect with which the Internet is quite useless. You need to spend some time
    on several different bikes to find what works for you and your style of riding. Do you think someone
    could tell fit you
    w/ a suit over the Internet? A bike is like a suit -- it needs to fit!

    Honestly, selling bikes is why local bike shops exist.

    Dave

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