Obviously there was quite a lot of wear to these ES wheels and they were written off. However, I'm now experiencing wear on a set of Ksyrium Elites that I bought this spring, they've seen quite a few kms (probably around 14 000 km) and lots of it in bad weather.
By the look of it the rim walls are concave by about >0,5mm... is that significant enough to justify a rim swap?
Judging by the pictures in this thread: http://yacf.co.uk/forum/index.php?topic=50083.0
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What is disconcerting is that the rim wear seems to have accelerated in the past couple of months with quite a few wet/slightly dirty rides.. and I've been very diligent in cleaning the bike and checking the brake pads for debris.