Originally Posted by
rpenmanparker
My mistake. All integrated headsets automatically use ACBs. So Cane Creek wasn't being weird not mentioning that. I guess it is just assumed. My bad saying they weren't necessary. Doh! That is what the angles are on the cartridges. Oh well. Live and learn.
What is strange is that Cane Creek is recommending a 36X45. They should know better. I hope it all works out for you.
I think Trek changed the headset components on this level Madone each year between 2011 and 2013, so it may just be that they have incorrect year/part correlation in their database. Anyway, hopefully this one works out. Interesting side effect of rusted bearings is that riding hands free became easier.