I'm in the process of converting the surly steamroller into an offroad ss. This small bit of rant is really intended for posterity's sake and not a trueblue whine:
1) fff should in reality be: fffusu700x35cfuycfsbcbw (fatties fail to fit unless something under 700x35mm counts as fatty and unless you can find something besides a caliper brake to work). Honestly, there is no way to get any kind of adequate clearance in the front with a caliper brake and 35mm tires. I am running fairly narrow rims (cxp22 in front, open pro in rear) but nothing outlandish. And in the back, with the rear axle squarely in the center of the drop out, there is less than 2mm of clearance between the tire and the seat tube. I'm going to try out some 30mm tires today and see how they work--but these are hardly "fatty." Or if they are, they're like "new Ricki"-fatty and not "Hairspray Ricki"-fatty.
2) I would not be doing this except for wanting to breathe new life into a neglected bike. I you're considering the ss route, look into other Surly makes, ones with cantilever bosses and longer chainstays.
3) That said, I still think this bike is going to look pretty dang cool when it's done.
Speaking of which: right now I have some old 3-spd mustache bars on it. These were taken off a Raleigh Robin Hood cruiser and have several deep gouges that I'm a little leery of. But the nice thing about them is they're short (no need to chop) and flared (not straight back like nittos). Anyone know where I can find a replacement set with these specs?