It was an f model.I have to say that Felt was really special but about 20% more cost.Listen,I'm told these days that all carbon bikes come from a few factories in Asia and there in simply no difference at all who makes it.I understand clearly that its the components that really make a bike and of course the rider.Im not a racer so i doubt a guy like me would ever know the difference to begin with so i thought i would ask the forum.