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Geometry questions

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  • April 15, 2014 at 5:25 am #21174
    Miles253

    Hey guys

    I’ve got some rather specific geometry questions

    The Cannondale Synapse 2014 has a head tube angle of 73 degrees and a wheelbase of 102.8cm in my size. The other bike I’m looking at continuously is the canyon SLX range. Comparatively it has a head tube angle of 73.25 degrees and a wheelbase of 101.4. Now in my understanding, a steeper head tube angle and shorter wheelbase often denote a more aggressive frame. Now in this instance am I wrong in saying that looking at geometry alone, the canyon is not any more aggressive then the synapse? If so then that’s great, as I worry whether I’m flexible enough for a really aggressive frame.

    Are there any other geometry factors I should be looking at before eventually choosing?

    Thanks

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  • April 15, 2014 at 2:25 pm #786599
    0
    Nixster

    Reach and stack are the two
    Reach and stack are the two main fit related geometry factors you could look at, which are related to horizontal top tube and head tube length (but also affected by frame angles).

    Greater reach and lower stack height usually is what is meant by more aggressive geometry.

    Speed of steering is only loosely related to head tube angle, trail and fork offset are more relevant.

    From my reading of it the Canyon has about 25mm less stack height than the equivalent reach Synapse carbon, although the sizing is not directly equivalent. This suggests a more aggressive geo fit wise plus the Synapse has a huge conical spacer on top of the headset. So more flexibility and core stability needed for the Canyon, probably.

    The usual suggestion is to go ride them but with Canyon that may take more effort?

    April 15, 2014 at 1:45 pm #786597
    0
    vorsprung

    Are there any other geometry

    Are there any other geometry factors I should be looking at before eventually choosing?

    It depends what you want to do with the bike

    If you want a fast bike for real racing then you might rate faster steering
    If you want to ride long distances then you want something more stable
    I always want a more comfortable bike so I get a longer head tube and shorter top tube
    If you want to do time trialling on it then there are probably factors for geometry for that

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