they're not the lightest or most aero, but they ain't terrible
Oh, but they are. Have you seen aero tests of Ksyriums? The only wheel which is actually worse is the R-Sys, and I think Mavic must have actually been going all out with that one to make it the worst wheel ever in any category. They're robust as long as you don't let any crap stay in the freewheel, but they're not fast.
Fair enough, I was thinking of a comparison with standard (probably archaic) 3 cross 32s or 36s on box section rims, not with modern carbon or anything specifically designed to be aero. Is there a comparison available? It's simply that after 10 years of heavyish use they won't die.
Not sure that anybody would bother to test Ksyriums against modern wheels, but the old Roues Artisanales test shows them as much slower than Aksiums or Shimano R500s
Oh, but they are. Have you seen aero tests of Ksyriums? The only wheel which is actually worse is the R-Sys, and I think Mavic must have actually been going all out with that one to make it the worst wheel ever in any category. They're robust as long as you don't let any crap stay in the freewheel, but they're not fast.