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  1. #1
    Senior Member
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    Road Bikes using Letter sizing.

    Does anyone know the cm or inch size for bikes only listed with a letter size? For instance, Nashbar has a bunch of road frames from GT and Schwinn for sale, they are a few years old, but they are listed as S,M,L, XL... I know my hybrid, which is an XL is 23 inches, but since road bikes are supposed to be bigger, Im wondering if they might be different.

  2. #2
    johnliu@earthlink.net jyl's Avatar
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    Varies by manufacturer but their website should say the dimensions for each size.
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  3. #3
    Senior Member
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    Even if you can find a geometry chart on their website, they can be hard to understand unless your current bike has the exact same frame angles. For a tall person (which I assume you are since your current bike is extra-large), top tube length is much more important than seat tube length. Top tube lengths on road bikes are going to be a lot different from hybrids.

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