Firstly, let me apologise for being too impatient to trawl through the many SS/Fixie threads (which I'm sure already contain the answers) but, as always your knowledge and experience would be greatly appreciated. I have decided after many months of pondering to convert one of my two Cannondale CAADX bikes into a SS as I never use the gears on it and mainly use it locally for flat(ish) trips to the pub & shops anyway.. The questions that I have are - (1) Are all SS chain-rings recessed to fit onto any 'spider' or are some just flat? I am hoping to use my original FSA crank arms. (2) Are standard road wheel hub splines strong enough when a sprocket converter kit is used? and, (3) Without horizontal drop-outs is it always necessary to use one of those 'damn ugly' pulley tensioner's?