Why is there so much friction on my rear wheel? With the chain detached, when I spin my rear wheel it slows down really quickly (2 turns?) as if the brakes are lightly on.  The brakes are well clear of the wheel though.  Any idea what it might be?  The bike is about 2 years old and I have not done any maintenance to the bearings, so I'm wondering if that might be it.  But I have no idea if those are really the symptoms.
Possible options could be


Damaged bearings
Bearing closed too tight
Bent axle
Spoke that touches the axle (I had it once when I put a straightened j spoke instead a straight pull one).