Can anyone explain how these three factors affect the handling of a bike? I have an old Nishiki with large amount of rake in the fork- something like 5.7 cm or 2 1/4 inches. I notice other bikes like the Kelly Knobby X have forks that are straight. Would a straight fork tend to make the bike more stable and less maneuverable by increasing the trail, or do I have that backwards? If I put a straight fork of the same length on my bike would it handle much differently? Thanks for the help.