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Thread: Sizing dilemma

  1. #1
    Member quietglow's Avatar
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    Sizing dilemma

    If anyone would care to give me an opinion on this I'd be appreciative:

    I'm about to buy my first cross bike and I'm trying to decide between two sizes (buying online). I have an out of whack inseam compared to my height: I'm 6' but my inseam (measured with the tape/book method) is 33". So I always ride road bikes in 55cm and use a long stem -- usually 140mm. This usually translates into a top tube around 55cm.

    Okay so here's the dilemma. My bike cross bike selection is between a 54 and a 56. I'd be okay with standover height on either, but I am really wondering what the wise cyclocrossers will say about fit. Basically if I get the 54, the top tube will almost the same as my road bike and if I use a 120 stem I should be significantly more upright than on my road bike (which is what you want, no?). If I get the 56, I get a cm of top tube length, a bit more standover, a shorter stem, and I'm leaned over a bit more.

    So the question boils down to what would be better for cross: a little smaller than normal or a little bigger? To complicate things, the paint I'd rather is only available in 54, and I'll probably use the bike for my bad weather training bike as well (which would seem to lend itself to going slightly bigger).

  2. #2
    Have bike, will travel Barrettscv's Avatar
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    Are you measuring your inseam barefoot from the floor to the crotch?

    Wrench Science offers fitting software. Its free, but you must register: https://www.wrenchscience.com/Login....dR&stylecode=R

    Michael
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    Quote Originally Posted by quietglow View Post
    If I get the 56 [...] I'm leaned over a bit more [than on the 54].
    Probably not. The TT is 1cm longer, but the headtube is probably about 1.5cm longer, which (all else being equal) puts the bars higher and a bit closer to the saddle. You also have a lot of leeway in the size of the stem.

    If you got the 56 and used a 120mm stem, your saddle-to-bar reach would be a bit shorter than on your road bike and your bars would probably be a bit higher up. If I were you, that is what I would choose.

  4. #4
    Member quietglow's Avatar
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    Yeah, I decided to go with the 56 and endure electric blue paint. Thanks all!

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    Electric Blue?

    Quietglow, where is there an electric blue cross bike for sale? That's the color I'd like. Thanks.

  6. #6
    Member quietglow's Avatar
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    Bikesdirect. And actually, I decided not to get it at the last possible moment (I had actually placed the order). A club-mate was selling an Empella Bonfire for a wickedly good price, and I was able to cancel my BD order. The Motobecane was a nice looking bike, but a Dura Ace equipped Empella is sort of in another category :-)

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