[QUOTE=RiddleOfSteel;20150186]

For high/medium/low trail, I'd categorize it as this:

High trail: mid-60s mm and up
Medium/sweet spot: 56-61mm or so
Low trail: mid-50s mm and below, with very low trail once you get into the 30s.

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I will admit that I am ignorant, so educate me. What is trail? What part of the front end trails and what leads?

If I I look at two bikes, one with a fork that is almost straight and a second with the old school curve, which one is low trail?

A straight fork to my mind will be twitchy, and a long curved one "slower" steering.