I bought mine used last year, they came standard on the previous owner's Bianchi. He rode them for about a year before upgrading to SLs because the rear wheel out of true. He didn't seem to know how to true a wheel. I have put about 1200 miles on them so far. I find them to be fantastic, very rigid, and very stable in high speed descents. So far I only had to true my rear wheel once, just for a minor adjustment.
How durable are elite ksyriums? I put on quite a few miles and would like to know how well these wheels hold up.
Got two sets, both used, and love them. They are very durable and fast. Only beef is that the rears have a tendency to go out of true a bit more than a traditional 36 spoke wheel. No knock on the K's, could be more of a low spoke count wheel issue.