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Old 12-07-18, 10:12 PM
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Join Date: Feb 2007
Location: Everett, WA
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Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004

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Originally Posted by Kapusta View Post
Please explain how seat angle could influence or mitigate toe overlap. Toe overlap is a function of the distance from the bb to the front axle. This is mainly determined by reach, head angle, and fork offset, wheel/tire diameter, and to a lesser extent by stack and fork length. I can't see how STA would have any effect on this distance.

You do often see differences in head angle and fork offset on smaller frames, and I always assumed that was to help address issues of toe overlap.

I don't really know why they change the STA, but my best guess would be because they anticipate a difference in the bb to saddle fit needs for shorter legged riders.
Because, if the saddle is in the same place, steeping STA moves the BB back. It's not a huge difference, maybe 1 cm/degree, but if they also change the HTA, enough to make a difference.. Seems simple to me.
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