Originally Posted by
PeteHski
Absolutely agree here. Vertical CofG is critical when descending and hence why dropper posts became so popular in mountain biking. But as a vehicle dynamicist I can also say that it does affect total grip from both wheels too. When you get dynamic weight transfer, you always lose more grip at the rear than you gain at the front (since the vertical load vs grip curve is non-linear). So lower CofG with less weight transfer is always better overall.
There's also angular moment of inertia. The higher you sit, the more critical it is to be smooth with your inputs. Suddenly diving into a turn could "shock" the tire and cause a slide. It's less likely with a lower center of mass.