Winium rims are about 300gm. Considering how you have had problems in descending recently, a stiff reliable rim with good braking characteristics might be what you need. I wouldn't trust the 202 for another year or so (Zipp always seems to have problems when they release a new product), the 280 is lighter only by 10-15gm, I didn't suggest it as it didn't compare to the rims you were first looking at, I don't know if I'd take them over Winiums in any case, it's such a nicely made rim in comparison. Never seen spoke hole bulges on a Corima rim like you do on every Zipp rim.

I've never seen the Ronda, the Flay looked okay, but heavy (mainly because of the hubs that I think they get from WR Compositi).

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Ride lightly!

SPADA! SPADA! SPADA!

Benz.