I ride a lot of miles. for example, this saturday is a 250 mile ride. 10% progression each week until two weeks before a 24 hour race in late july. add in commuting and two week day training rides of 50 to 100 miles and you have a lot of miles burning through chains(dura-ace) and tires (gp4000 contintental)

The crankset failed due to, I guess, a bad manufacturing design, or something along those lines. They should've probably had a recall but are too cheap to do so. Instead, they quietly replace their $500+ cranksets and move on. Both pedals installations (the metal interface inside the carbon crank arm) have come loose making the pedal wobble. the bottom bracket is also chunky feeling. this may be from riding quite a few times in the rain...i don't know.