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Road Bike Frames, Wheels & Components / Re: Speeder Cycling SC-R55D
« on: May 22, 2024, 07:49:48 PM »bolded part is all industry marketing mumbo jumbo. second part is true, but the main thing is about reducing deflection of the front wheel due to riding surface, wind, or manhandling the bike at high power out of the saddle and increasing stability at speed. taller, heavier riders need this more, not less than smaller riders.
increasing reach (and thus FC) will only increase stability a bit - as it'll be a smaller amount and head angles would still be far too steep.
from a fit, bike handling and geometry perspective there is absolutely no reason for larger frames to have steeper head angles. whilst there's plenty for them to have slacker head angles. the status quo is purely about package size.
also any further increases in reach are going to need increases in seat angle - they're already far too slack in larger sizes.
No, the bolded part is physics. Of course you can change other parts to the design to offset it (like lowering the rider). Fit and physics are often at odds in bike designs yet dependent on each other. Its a pretty hard thing to get right.