Thread: Frame Geometry
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Old 08-11-08 | 08:20 PM
  #11  
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Nessism
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From: Torrance, CA

Bikes: Homebuilt steel

Originally Posted by Thylacine
I don't think that's controversial at all. Most directional changes are made (initiated) via weight shifts, so if your CG is lower, you have a much shorter 'pendulum' which means less movement is required to create the same lean angle.
Seems obvious to me, and obviously you, but the old urban legend that a low bottom bracket "adds stability" is what a lot of people believe.

One of my favorite experiments to make my point is to tell people to take a yard stick and balance it with their palm underneath. After they get the hang of it, I tell them to try the same thing with a 12" ruler; the yard stick is much easier to balance because the CG if further away from the pivot point. This same thing applies to bikes; a high CG is more stable, but harder to turn. Truth be known though, the total range of effective BB heights on bikes is quite narrow so as to make this discussion somewhat unimportant. Interesting internet banter but not overly significant in the real world.

Last edited by Nessism; 08-11-08 at 08:24 PM.
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