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  • Anyone care to explain the (probably pretty basic) principle of ETT vs frame reach? Trying to get my head around how more ETT but the same reach could possibly equate to about the same fit. About 1.5 degrees difference between the two seat angles, so I get where it comes from, but what difference would it mean in terms of fit? Surely more top tube = more stretch, even if the reach is about the same?

    Oh, and I'll go with the usual tactic of recommending the only thing I know and say BW for Bristol bike fitting.

  • As @Lolo says, if you make the seat tube steeper, you'll get a shorter ETT (by insersecting the horizontal closer to the front) but this is only a problem if you can't get enough layback to put your saddle in the same place relative the BB and bars.


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