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  1. #1
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    First CX purchase, trying to understand sizing.

    Hi,
    I currently own a CAAD10 Force 2 in size 60cm, which fits me well.
    I am looking to get a CX bike for recreational riding, don't think I will be doing any races. I like the idea of rear rack availability in case I want to use it as a light touring or commuting bike.
    From what I have read I should be sizing down on the frame compared to my road bike. Is that is only a recommendation for people who plan on racing the bike? Is it safe to assume you size down to make getting off and on the bike easier for going over obstacles or is it to have a tighter geo due to shorter sprints during CX races?
    If I don't plan on racing it would it be "OK" to get a bike with a similar size/geo to what I have now?

    I was looking at 3 bikes right now:
    Cannondale CAADX 105
    Felt FX65
    [Bikes Direct] Motobecane Cross TI Pro

    My price range is under $2000 [closer to 1600 if possible]. Its not going to overtake my CAAD10 as a daily rider, but I like the idea of CX so I want to venture into it, and I can use it during the winter to ride].

    Given my budget and listed bikes, what you recommend? The Motobecane isn't currently available in 58.

    Thanks,
    Aristo
    http://www.pedalroom.com/members/AristoNYC

  2. #2
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    After trying to compare the geometry & sizing of the bikes I have to say that the 61cm Motobecane seems like the right way to go.
    The stand over height is shorter than both the 58 CAADX & my current 60CM CAAD10. the top tube length is the same as my current bike at 59cm. The only thing is the headtube length is shorter (16.5 vs 18)
    Last edited by AristoNYC; 08-17-14 at 08:07 PM.
    http://www.pedalroom.com/members/AristoNYC

  3. #3
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    I measure out at 58cm for frame size on a standard road bike. This year I got a CAADX Tiagra ( the 105 or Ultegra wasn't available for me) which is the same frame as the 105. I talked with the guys at C'dale main offices, and they recommended going a size down to 56cm, so I did. The bike fits perfectly - a 58cm bike would have been too big for me. BTW, I love the bike!

  4. #4
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    The sizing-down myth is a zombie that won't go away.

    Size a bike by its (1) stack and (2) reach. If you like the way your current bike fits you, then aim for the exact same numbers in your new bike.

  5. #5
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    Quote Originally Posted by flargle View Post
    The sizing-down myth is a zombie that won't go away.

    Size a bike by its (1) stack and (2) reach. If you like the way your current bike fits you, then aim for the exact same numbers in your new bike.
    I actually went up a size. I usually ride a 54cm in a Specialized road bike, but for a Specialized Tricross, I had to go to a 56cm.
    Demented internet tail wagging imbicile.

  6. #6
    Senior Member
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    Thanks everyone for the responses.
    I ended up ordering the 61cm Motobecane. Hopefully it fits well based of the geo chart. The headtube length is the only thing that scares me, I currently use spacers on my CAAD10 headset.
    http://www.pedalroom.com/members/AristoNYC

  7. #7
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    Quote Originally Posted by AristoNYC View Post
    The headtube length is the only thing that scares me, I currently use spacers on my CAAD10 headset.
    Hm, the BikesDirect geom charts don't list stack and reach. Quelle surprise.

    Cross forks are longer than road forks, so you can't directly compare. The difference is around 3 to 4 cm.

  8. #8
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    5' 9/10" here but the 56cm Tricross was best for me. I hate the feel of a small frame and get full pedal potential with a frame at the larger end for my height.

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