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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.
As ever, I bow before you technically gifted types. However, my Ksyrium SLs give every appearance of being indestructible, it's true they're not the lightest or most aero, but they ain't terrible and they are stiff. Why won't they die (or even go out of true)? The roads around here are shite and they've shrugged off the worst that Portugal, Thailand, Cuba, Slovenia (Strade Bianche central!) and Belgium can throw at them....