It’s an 80mm fork. The 2011 frame is corrected for a 100mm fork. That’s a 2010 which was designed around an 80mm fork.
Yes I know the steering arrangements may seem rather odd. Let me explain….
I like the shape (upsweep, width and backsweep) of the riser bars.
To get them low enough I need to run the stem upside down.
With the stem the right way up I’d have to chop down the steerer tube more which makes the forks harder to sell on. Also, I like the way it looks with the stem upside down. The lines flow along the top tube better 😉
GB