Donald Gillies 23 March 2005 15:03:41 [ permanent link ]
Derk <I_hatespam@invalid.org> writes:
Hi,
I can buy a CXP22 + Ultegra hub wheelset here.
How are these CXP22 rims compared to the CXP33 ?
I will comment on the CXP21 which came right before the CXP22. The CXP21 is/was a very strong rim, good for cyclists over 200 lbs like myself. My CXP21 rims survived the famous "ultegra brake pads from hell" which cut grooves in the rims before i figured out what was happening. If you want a rim that is sturdy and never goes out of true, the CXP21/22 is the Mavic rim for you. The CXP21/22 is the stiffest and heaviest of the 4 main 700c clinchers in the mavic line (Open Pro, MA3, CXP22, CXP33.) However, the weight penalty is not severe, it weighs only 490gm, compared to 425gm of the flimsy Open Pro rim, so the weight penalty is below 15%.
Donald Gillies wrote:>My CXP21 rims survived the famous "ultegra brake pads from> hell" which cut grooves in the rims before i figured out what was> happening. Wait a minute, that's why I want to replace the other wheelset: I used Ultegra brake pads on those and the rims look like what you describe here. Are these the grey coloured brake pad holders?
If you want a rim that is sturdy and never goes out of> true, the CXP21/22 is the Mavic rim for you.
I need it for my backup/winter bike, so weight is no problem here.
I have tan as my training wheelset on Centaur hubs. I am pleased, but one thing I noticed is that the rim edges dent more easily than I'd like. However, they straightened out very easily, using light leverage with an adjustable (mollet) wrench. I paid 100€ for them, with 2.0-1.8 spokes, last spring. -- Bonne route,
Petengail@Yahoo.Com 23 March 2005 17:28:57 [ permanent link ]
Quoth Don:>... flimsy Open Pro rim...
I beg to differ. I have ridden 32 hole OP's for years at anywhere from 195 to 235 lbs and found them entirely serviceable. They have stayed truer longer now that I am consistently at the lower end of that spectrum, I would admit, but your characterization is hyperbole.
I believe that the CXP 2x is pinned, with two small circular channels (similar to an MA3), while the CXP33 is welded and entirely hollow (similar to an Open Pro).
That said, I've been riding a set of 28 spoke (F&R) DA/CXP21's that I picked up off eBay about 1000 miles ago (don't know how many miles they already had), including 300 miles or so of post-winter SLC potholes with nary a wobble, all with my ~190lb girth. Not much to base my opinion on, but thus far I'm satisfied.
<petengail@yahoo.com> wrote in message news:1111584537.115634.131400@g14g2000cwa.googlegroups.com...> Quoth Don:> >... flimsy Open Pro rim...>
I beg to differ. I have ridden 32 hole OP's for years at
anywhere from> 195 to 235 lbs and found them entirely serviceable. They have stayed> truer longer now that I am consistently at the lower end of that> spectrum, I would admit, but your characterization is hyperbole.
You and me both (although I topped out at about 225). The OP is a good rim, and I wish Mavic made it in an OC model. -- Jay Beattie.
I have seen two versions of CXP22 rims; one with and one without eyelets. I think they are both good. Retail channel carries the ones with eyelets and OEM gets the ones without eyelets. Mavic rates them equal in strength; and equal in strength to OpenPro as well as CXP33. Mavic rates their MA3 rims for 85 kg rider weight compared to 100 kg for CXP33, CXP22, and OpenPro rims. If you get the CXP22s with eyelets they may provide a smoother interface for nipples. CXP33 has cast metal sockets for purpose made nipple washers which are held in place by spring fingers between the inner and outer rim channels. This arrangement makes it very easy to insert spoke nipples without worrying about dropping them into the rim cavity.... if that is an issue to you.
daveornee wrote:> I have seen two versions of CXP22 rims; one with and one without> eyelets. I think they are both good. Retail channel carries the ones> with eyelets and OEM gets the ones without eyelets.> Mavic rates them equal in strength; and equal in strength to OpenPro> as well as CXP33.> Mavic rates their MA3 rims for 85 kg rider weight compared to 100 kg> for CXP33, CXP22, and OpenPro rims.> If you get the CXP22s with eyelets they may provide a smoother> interface for nipples.> CXP33 has cast metal sockets for purpose made nipple washers which are> held in place by spring fingers between the inner and outer rim> channels.> This arrangement makes it very easy to insert spoke nipples without> worrying about dropping them into the rim cavity.... if that is an> issue to you.
Don't the sockets enable higher spoke tension by distributing load more evenly?
Qui Si Parla Campagnolo 25 March 2005 18:11:46 [ permanent link ]
Marc wrote:> Qui Si Parla Campagnolo wrote:>
Derk wrote:>>
Hi,>>>
I can buy a CXP22 + Ultegra hub wheelset here.>>>
How are these CXP22 rims compared to the CXP33 ?>>>
TIA, Derk>>
Single eyelet, similar to CXP-33, 32 hole only. We have built more>
than>
a few with good results.>
Peter, got any opinion on the diff between the Alex AT 400 rims and the> CXP-22?>
Our experience with Alex have been on wheels, complete, bought elsewhere, that that the seller didn't tension, true, etc..Not really impressed with these wheels, never built a wheel with Alex rims.
Qui Si Parla Campagnolo 25 March 2005 18:13:57 [ permanent link ]
Pete Biggs wrote:> daveornee wrote:>
I have seen two versions of CXP22 rims; one with and one without>>eyelets. I think they are both good. Retail channel carries the ones>>with eyelets and OEM gets the ones without eyelets.>>Mavic rates them equal in strength; and equal in strength to OpenPro>>as well as CXP33.>>Mavic rates their MA3 rims for 85 kg rider weight compared to 100 kg>>for CXP33, CXP22, and OpenPro rims.>>If you get the CXP22s with eyelets they may provide a smoother>>interface for nipples.>>CXP33 has cast metal sockets for purpose made nipple washers which are>>held in place by spring fingers between the inner and outer rim>>channels.>>This arrangement makes it very easy to insert spoke nipples without>>worrying about dropping them into the rim cavity.... if that is an>>issue to you.>
Don't the sockets enable higher spoke tension by distributing load more> evenly?>
~PB>
Tension is tension, regardless of whether or not the rim has sockets, eyelets or nuthin' The rim w/o anything is designed to be strong w/o eyelets or sockets, as are the others. No need for higher than normal tension on an eyeleted rim.
Qui Si Parla Campagnolo wrote:> Pete Biggs wrote:>
daveornee wrote:>>
I have seen two versions of CXP22 rims; one with and one without>>> eyelets. I think they are both good. Retail channel carries the ones>>> with eyelets and OEM gets the ones without eyelets.>>> Mavic rates them equal in strength; and equal in strength to OpenPro>>> as well as CXP33.>>> Mavic rates their MA3 rims for 85 kg rider weight compared to 100 kg>>> for CXP33, CXP22, and OpenPro rims.>>> If you get the CXP22s with eyelets they may provide a smoother>>> interface for nipples.>>> CXP33 has cast metal sockets for purpose made nipple washers which are>>> held in place by spring fingers between the inner and outer rim>>> channels.>>> This arrangement makes it very easy to insert spoke nipples without>>> worrying about dropping them into the rim cavity.... if that is an>>> issue to you.>>
Don't the sockets enable higher spoke tension by distributing load more>> evenly?>>
~PB>>
Tension is tension, regardless of whether or not the rim has sockets, > eyelets or nuthin' The rim w/o anything is designed to be strong w/o > eyelets or sockets, as are the others. No need for higher than normal > tension on an eyeleted rim.
you're both right, kinda. eyelets /do/ help distribute local loading, but they're used on thinner rims, so their presence doesn't mean higher tension.
jim beam wrote:> Qui Si Parla Campagnolo wrote:>> Pete Biggs wrote:>>> Don't the sockets enable higher spoke tension by distributing load>>> more evenly?>>
Tension is tension, regardless of whether or not the rim has sockets,>> eyelets or nuthin' The rim w/o anything is designed to be strong w/o>> eyelets or sockets, as are the others. No need for higher than normal>> tension on an eyeleted rim.>
you're both right, kinda. eyelets /do/ help distribute local loading,> but they're used on thinner rims, so their presence doesn't mean> higher tension.
I notice the the thicker rims use a weaker grade of alloy. Does that make much difference?
Apparaently the MA3, a rim without double eyelets or sockets, is poor at dealing with "normal" tension, re spokes pulling through, etc (and I've experienced this with similar Vuelta Tempest rim), but this is rare with the Open Pro despite its walls being thinner.
