That is a Serotta Fork F3 with 8.3 stiffness., Yes I spec'd the parts, River City out of Portland measured me about 6 weeks ago, ordered the frame and fork to my size, and then built the bike. It is a Ritchey carbon seat post. The Brooks I bought 1 month ago from Wallingford Bike , I have the Professional and the B17, running the B-17 right now on the Serotta, the Professional is now on the Sekai. I still like my Sekai and will be adding fenders to it for rain days, I am considering Full Wood Fenders - real wood- they look so nice. So far the B-17 is very comfortable -- but I think it is due to my 215 lbs - which in MO will break in a Brooks sooner than a 140 lb dude.