So I have a Works -2 deg EC44/ZS56 headset which I originally bought for my Spitfire but then was inspired to buy a Zero AM and put it on that with a 130mm fork. And since then the Zero has gone to a Cane Creek -0.5 and 140mm fork and external lower cup and the Works one is spare and I’ve been ill and off the bike for literally three weeks and this thread happened. Curiosity has now got the better of me – time to put the Works into the Spitfire and shorten the 160mm Pike to 150mm.
Current geometry in Low:
HA: 65.7
SA: 73.2
Reach: 419mm
BB height: 342mm
And High:
HA: 66.7
SA: 74.2
Reach: 429mm
BB height: 354mm
(Neutral is exactly halfway between)
-2 deg and 150mm Pike will give this in Low:
HA: 64.1
SA: 74.1
Reach: 425mm
BB height: 335mm
And high:
HA: 65.1
SA: 75.1
Reach: 435mm
BB height: 347mm