I can't figure why the Spinergy PBO's are so slow to be known about and catch on. The spokes are half the weight of steel and 3 times the strength, so a 16 spoke radial front is extremeley aero, especially when combined with the 43mm deep carbon fibre wheel. I'm no racer, but I am a very fast club rider and members of my club seem to not know about my wheels (Spinergy Stealth PBO) and are also astounded that they can't hold my wheel descending. I guess if you're a flatlander and want to be able to spin up a sprint breakaway on queue, you could make a case against the 1695g weight of the wheelset. IMO, they are a great, reliable, durable, all around wheelset. As far as I know, nobody who has actually ridden them thinks ill of the Spinergys with their PBO spokes. I was surprised to find out recently that PBO has been used for the rigging on top level racing yachts for most of the last decade. Google "PBO rigging" if you'd like to read up on same.