I just returned my SRAM Force crankset through a bike shop. I have put approx 1,200 miles on it and at about 600 I noticed that it was so wobbly that it hit the front derailuer (even after many adjustments). I thought that I bent the large chainring, but after I replaced that it still happened. I have no clue how it happened? I talked to customer service at SRAM and they indicated that they would happily replace it. It did sound like it is somewhat common???
I though that carbon couldn't bend - just break? That is thepoint - stiffness, yet light.