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  1. #1
    RoadBikeReview Member
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    double or compact front sprokets/crank size

    Is there a "norm" that most of you follow for the front sprokets and front crank length on the Bianchi, double 54/39 or compact 50/34? I am working up the build on this Infinito and just not sure what may be best?

    The Ultegra version I test rode had the 50/34 and it seemed to spin up real nice, although not sure what the crank length was but assume 175mm?

  2. #2
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    I gave my proposed build to the LBS today. He said for our area the compact 50/34 would be the way to go as we have a lot of hils. I asked about the crank length and he thought 170 because its a 53 and thats the same I run on my mountainbike (Tallboy)

  3. #3
    Bianchi-Campagnolo
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    Yes.
    Chainwheel sprockets should be chosen based on rider ability and terrain. Most recreational riders are just fine with a 50/36 for flattish and 50/34 for hillier terrain.
    Crank arm length is mainly a function of leg length. 170 for a 53 frame is roughly ballpark. Here's a reference: http://www.cptips.com/crnklth.htm

  4. #4
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    If I go with the chart, I am in the 170mm crank range for "size of bike and inseam". I use a 170 mm crank on my med mountain bike, it seems to spin up good (for me)

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