Originally Posted by ElRey
Hence, I initially bought a frame set with 73 degree frame geometry (Cdale) and changed out the fork with something a little bit quicker. Changed the handling characteristics completely. Frame geometry didn't change.
And I went the other way on my old Gitane with 74 degree head angle. I had the steel fork straitened by about 3 mm thus increasing the trail.
Both of us, by our fork modifications changed the frame geometry: We changed the rake, we changed the wheel base and I changed the steering angle slightly by raising the head tube a smidge.
My Gitane was much less twitchy on rough descents after the change.