Did bike shop measure me correctly? (bianchi sempre)

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  • neeb
    neeb Posts: 4,473
    drlodge wrote:
    Now once you find a bike that gives you the right reach, you can find out the eTT and stem length and frame angles and compare other frames to see how that match up - bearing in mind the above advice that eTT/stem length needs to change as seat tube angle changes.
    Yes, that's all I was saying. People tend to forget about the seat tube angle, but it doesn't make much sense to compare effective top tube lengths without it.
    drlodge wrote:
    I think the best test is to (a) see if the position "feels" right when riding and (b) take a photo side on to see how you look - what your body angles are and whether that "looks" right. If it looks and feels right, it will be about right.
    That's correct up to a point and a good way to get started, but will only get you so far. You tend to "feel right" when you are in a position you are used to, but that doesn't mean that there isn't a better position that might initially not feel right until you get used to it.
  • neeb
    neeb Posts: 4,473
    P.S.
    drlodge wrote:
    The frame angles, top tube length and stem length are all taken into account by the saddle - bar measurement.
    Yes, or a similar way of saying the same thing is that the best measurement for comparing one frame to another is reach, i.e. the horizontal distance from a vertical line through the BB to the top of the headtube. It's just a pity so few frame manufacturers provide this! It's one of my pet hates about frame geometry charts, along with failure to provide fork offset and/or head tube angle...

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