Hey Ben,
First, thank you for being patient with my questions, even if I do mix up terms and units. The terms are not yet fluent to me. Your last response made me realize that I have been co-mingling caster and mechanical trail. I agree, trying to anwer ambiguous questions is tuff...especially if the guy asking is really persistent
So I'll give it one more shot. Will positive mechanical trail dilute the affect of pneumatic trail. I understand that pneumatic trail is a function of the tire. However, to my novice brain, mechanical trail imparts another force on the tire???