Originally Posted by
bulgie
Maybe I'm quibbling, but I think it's good to keep in mind that you are not changing the rake, you're only changing the effective head tube angle. Yes that changes the trail, as the subject line says, but in the opposite direction as your first sentence says ("I would like to change the rake").
Adding rake at a given HTA lowers the trail, but a headset can't do that. Lowering the HTA via this headset, at a given rake, raises the trail. Are you OK with that?
If lowering the trail is the goal, then steepen the HTA.
I'm not familiar with those headsets, but I assume they can go either way?
Yes, they can go either way. I understand they don’t change the rake, but most numbers bandied about are around rake. The fork in question has a rake of 57mm and is way too twitchy. I have a fork with a rake of 55mm which is perfect, so I’m trying to end up with a similar result (N=many…).