Originally Posted by Ziemas
+1
Sounds like a bad wheel build to me. I have a set of CXP 30s(previous generation of the CXP33) laced to 28H hubs that I bang the hell out of on cobblestone streets. They are still true. If I were you I'd be looking to have my wheel trued and tensioned by a different wheel builder as it's not the rims which are the problem.
I'm in the "Build is Everything" camp as well.
On my Marin Kentfield city bike, i have no-name wimpy rims, no name straight gauge spokes and cheapo Formula hubs. For the first two months i had a broken spoke every couple of days. I had no idea about anything as a newbie, so i thought i was getting what i paid for.
To replace a spoke every time, I'd go into any shop, replace it and ride till the next one would break.
Then, i got pissed, and stormed into the LBS where i bought the bike, and demanded that the wheel be rebuilt. Same rim, same spokes, same hub. Since then, it's been almost 5K km', and the wheel is as true as it was when i first got it. And i weigh about 180, the bike is about 30, plus a pannier (7-12).
And i ride without much caution on roads that haven't seen a municipal employee in years.
Six months later, by the way, i bought another Kentfield for my GF, who has no technique and slams into every sidewalk and pothole she can - same thing, true as new( i asked that the wheels be tensioned before i took the bike out) .
My advice - rebuild, or re-tension the wheel.