Here is a shot of the barspin clearance on the large V2 Prototype w/ 26 x 2.3's, 172.5 cranks, and a 405 AC fork. Still trying to get used to the fact that I don't have to worry about hitting my toe ever again. Made the top tube on the bike a touch longer, and played with the head tube angle. The production fork is going to be somewhere between 417 and 420 AC, making the toe clearance even better than what it already is. I'll make an update with a photo showing the clearance on the medium sized frame with 175's.