Please, take the time to make sense in your posts! And it won't work with any of the 'trials cranks' - as this is neither 'square taper' or 'ISIS'... I've no idea what you where on about with FFWs and rear freehubs! But if you confused somehow on the subject, you either have #1..A freehub, with a fixed sprocket/chainring (either screw on, or some cranks have you bolt on a chainring) #2..A FFW on screw on cranks, with a fixed rear hub (either screw on, gears, or single sped) Don't have one of each - it'd feel wank! bye