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What's so bad about CXP-30's?(8 posts)

What's so bad about CXP-30's?jw25
Oct 12, 2001 4:49 PM
Why do I keep seeing bad comments about these rims? I know they're heavier than people want to think about, but I keep seeing arguements for aero over light, and these are tempting.
In the same vein, I have a brand new set of America Classic ultralight hubs on the way, and haven't settled on what rims to lace them to. The weight's conducive to a superlight, climbing setup, but I keep thinking I'd be better off with a semi-aero rim (like the CXP-33 or Velocity Deep-V). I've already got a set of Cosmics for TT's, but 16 spokes is a little flexy for regular racing.
Opinions and comments appreciated.
Thanks, Jon
Dunno about the Mavic 33's, but...Ahimsa
Oct 12, 2001 6:08 PM
I'm not one for aero rim structures. I just recently had Salsa Delgado Cross rims built up 32 spoke front and rear, and they are absolutely stiff as a board for most applications. And at 460 grams they are relatively light for thre durability. $ is good to.

My 2 cents.

A.
re: What's so bad about CXP-30's?mapei
Oct 12, 2001 7:59 PM
well, they are okey. It's a low-end Mavic rim. It's just that roadies is a very snobbish group(you can probably see if you go to the races). Everybody's got the Ksyriun(i do), Colnago, Sidi(i do), that they call everything else junk, when in fact they are just as good for a regular rider. How good are their legs anyway?
I rode them for yearsPaulCL
Oct 13, 2001 4:38 AM
Yes, they are very heavy compared to upper end rims or wheelsets. But, the rims are bombproof. I put about 4000-5000 miles on a set before selling them off this board.

If given a choice, I would still go with the open-pro's. Just as strong, but lighter. Aerodynamics? Marginal plus for the cxp30's.
There's nothing wrong with them...Jofa
Oct 13, 2001 4:47 AM
...they're about as good as any other popular rims out there, if a little heavy. Or, to put it another way, there isn't a lot to be asked from a rim design other than it doesn't break, that it is beefy enough to allow for decent spoke tension, and is reasonably light. This rim will do, though I prefer the Open Pro or MA3 as they aren't as deep, and are a little lighter. All these designs however are prone to fatigue fracture around the spoke sockets, as a result of their anodizing.

A long time ago rim designs from various manufacturers converged on a simple design: as close to a rectangular box-section as the tyre clinch or tubular well would allow, made from about 450grammes of aluminium alloy. The best and last exponent of all this is the discontinued MA2... which was cheap to boot. If you can find any gathering dust in a shop, I recommend these, for all uses, including spangly climbing wheels.

Jofa
There's nothing wrong with them...No MA2 for me...
Oct 14, 2001 3:53 AM
I had a pair of wheels built with MA2 rims. They were terrible! The join line of the rims was extremely rough on both rims, with a noticeable effect on braking.

True, they looked nice and retro, but I was unimpresed as to their other qualities.

I now own two wheelsets with semi-aero rims--one with Sun ME14a rims, and the other with Aeroheads--and I'm much happier with these than I ever was with the MA2.
There's nothing wrong with them...Jofa
Oct 14, 2001 5:11 AM
In my experience it's only taken a few long wet-weather rides for the brake-blocks to grind the joins of any aluminium rims smooth: perhaps you don't ride down hills or in adverse conditions. In what other ways did these rims fail you so badly?

Jofa
re: What's so bad about CXP-30's?SkunkWorks
Oct 13, 2001 2:14 PM
10,000 miles of broken pavement and hopping curbs and I still can not destroy those beasts. CPX-30's may be a bit heavy, but they sure are tuff and on flatter rides they roll along nicely.