CXP30 or Open Pro or MA40 ?
Arthur Haigh
OpenPro.
I know the OP is lighter but the the CXP30 is considered Hi-performance. It
the weight less of an issue in the 30 because it is distributed over a
deeper rim ?
Thanks,
Art
Mark Atanowicz
"Arthur Haigh" <a...@darius.pet.upenn.edu> writes:
> Can anyone tell me the advantages/disadvantages of the Mavic CXP30 vs. the
> OpenPro.
The CXP30 is more aerodynamic and durable but heavy. The Open Pro is
lighter, more fragile, and less aerodynamic.
> I know the OP is lighter but the the CXP30 is considered Hi-performance. It
> the weight less of an issue in the 30 because it is distributed over a
> deeper rim ?
No. If you ride over 20 MPH and don't climb major hills, I'd say the
CXP30 is the best choice.
Mark Atanowicz
Roger Musson
>Can anyone tell me the advantages/disadvantages of the Mavic CXP30 vs. the
>OpenPro.
>I know the OP is lighter but the the CXP30 is considered Hi-performance. It
>the weight less of an issue in the 30 because it is distributed over a
>deeper rim ?
You don't see many CXP30's in the Pro bunch but you do see Open Pro's
and other conventional shaped rims plus a plethora of designer carbon
and factory specials which may or may not give you any benefit.
Adding some extra 10mm or so to the depth of the rim will not empower
the CXP30 with magical aerodynamic qualities. Okay it's a tough rim
but all decent rims are tough enough but the CXP30 is real heavy and
IMHO ugly.
Go for the Open Pro. Silver is as good as any but will look grubby
after use in the wet and grime and is hard to clean. The CD is more
popular with racing cyclists because CD's are what they've always used
- don't ask why? Blue is the less popular choice but take a look at an
example before purchasing since it's a very pale grey blue not to
everyone's liking.
Roger Musson (not a member of the CXP30 fan club)
ComutrBob
Forget the CXP30. It has no advantage because it's usually built up with
conventional spokes, conventional spoke counts and conventional hubs. Instead,
consider something like Mavic's Cosmic Expert wheels. They have essentially
the same rim as the CXP30, mated with a reduced number of radially laced,
bladed spokes and really nice Mavic hubs. With these, you get a true aero
benefit without the weight penalty you get with CXP30-built wheels. I also
have a set of Open Pro wheels. I've built them up very light with DT
revolution spokes and Chris King hubs. They are very light and great for rides
in the mountains. So, skip the CXP30s. If you can afford the freight and want
high-speed aero wheels, go with Mavic Cosmic Experts. If you want climbing
wheels or something less expensive and more universal, get some wheels built
light with the Open Pro. I think MA40s are tubular only. Not sure. I've had
direct experience with all the wheels mentioned here except the MA40s.
ride more
> light with the Open Pro. I think MA40s are tubular only. Not sure. > I've had direct experience with all the wheels mentioned
> here except the MA40s.
MA40s are for clinchers............. Replacements for MA2
Andrew Blankeatz
Jobst Brandt
> MA40s are for clinchers............. Replacements for MA2
I think you got that backwards. When your MA40 cracks, replace it
with an MA2 that is less expensive, exactly the same cross section and
without anodizing to initiate cracks. All the bicycle equipment geeks
love black, black rims, frames, pedals, bar tape, and now black spokes
from DT. I guess it goes with black windows on the truck or Suburban.
You know how it is, you gotta drive truck and have mean black hardware.
Jobst Brandt <jbr...@hpl.hp.com>
Mark Atanowicz
comu...@aol.com (ComutrBob) writes:
>
> Forget the CXP30. It has no advantage because it's usually built up with
> conventional spokes, conventional spoke counts and conventional hubs. Instead,
> consider something like Mavic's Cosmic Expert wheels. They have essentially
> the same rim as the CXP30, mated with a reduced number of radially laced,
> bladed spokes and really nice Mavic hubs. With these, you get a true aero
> benefit without the weight penalty you get with CXP30-built wheels.
I would only recommend this to racers who have lots of extra cash.
These wheels are incredibly overpriced and if you trash a wheel, you
*must* send it to Mavic for replacement because the spoke counts are
non-standard. Several posters have complained that is takes *months*
to get their wheels back. Not worth a couple hundered grams, IMHO.
Mark Atanowicz
Mark McMaster
That, and 4 out of the 6 pairs of Cosmic Experts owned by friends have
developed creaking sounds from the rear wheel, eminating from the
non-drive side spoke nipples. The special "eyelets" used in the spoke
holes of these wheels are not riveted to the rim but just rest within
the walls of the "V" shaped cross section. The low spoke tension of
these wheels as delivered by Mavic allows the non-drive side spokes to
slacken enough at the bottom of the wheel for the "eyelets" to move
slightly within the rim, which causes a creaking sound.
Mark McMaster
MMc...@ix.netcom.com
Clinton Lum
rims which are the same as the Open Pro, but with different alloy. I the
CXP30 should be more aerodynamic more suitable for time trials on flat
courses. I build them with bladed spokes 24 front and 28 rear. My Reflex
wheels have 36 spokes at the rear and 32 at front. I don't ride the
CXP30 much but I believe that they are as strong or stronger than my
Reflex wheels. You can really get the spoke tension high with the CXP30
rims. The brass spoke nipples will fail before the rims shows any sign
of stress. IMHO the tradeoff is a heavier, stronger aero wheel vs. a
lighter, weaker and less aero wheel. If you don't race it doesn't really
matter.
Morten Reippuert Knudsen
That's why a lot of people prefer Campangolo!
--
med venlig hilsen Morten Reippuert Knudsen
motto: Rigtige mćnd tager ikke backup!
Frederic Vailler
> Can anyone tell me the advantages/disadvantages of the Mavic CXP30 vs. the
> OpenPro.
> I know the OP is lighter but the the CXP30 is considered Hi-performance. It
> the weight less of an issue in the 30 because it is distributed over a
> deeper rim ?
> Thanks,
> Art
My road bike came with CXP30 (32h front and rear), they are stiff but heavy and
there is not aerodynamic advantages due to the number of spoke.
I've ordered a pair of open pro (36h rear, 32 front), they are as stiff and way
lighter, durabilty should be the same, both have made with the SUP process.
Aerodynamic are nice looking, but execpt if you can ride at 30mph easelly, they
are not usefull.
Charles 'Buck' Krasic
Hey, that exactly describes the problem I'm having with my rear
Expert.
The question is what can/should I do about it? Increase the spoke
tension? Lubricate the eyelets? Pester Mavic?
-- Buck
Mark McMaster <MMc...@ix.netcom.com> writes:
ComutrBob
Fred,
You really hit the nail on the head. Those CXP30 rims don't need 32
conventional spokes beating the air to offset the aerodynamics of the rim. On
the other hand, I have a set of Mavic Cosmic Expert wheels. The rim is
identical to a CXP30, but it has 18 radially laced and bladed spokes in front
and 20 in the rear. The difference is huge (and I've ridden CXP30s with
conventional spokes). My Cosmic Experts are very nice -- aerodynamic, durable
and reasonably light.
FYI,
Bob
Mark Atanowicz
comu...@aol.com (ComutrBob) writes:
Out of curiousity, just how much faster are you able to go on your
Cosmics?
Mark Atanowicz
Alex Beascoechea
In this discussions I always end up wondering what would be the set of wheels that
is really optimal. A pair of Mavic CPX30's would cost about $350 at CC with campy
record. If I were going to use bladed spokes and Mavid Hubs I would have to pay
more, but possibly still lower than the $550 or so that the experts cost. But not
very much more (because it would be easier to find sales for the manufactured).
Still this seems very expensive. What are the set of wheels that you guys have in
mind when you think about a good combination of weight/strength and quality? How
would you spec it (rim/spokes/hubs..)? Where would you buy it? How much would it
cost? (To make the comparison simple, we could compare it to a set of CXP30s).
I ask this because in general I see criticism to manufactured wheels, but when is
time to state where those wonderful hand-made wheels are made, I do not seee any
data or names. Definitely I would not trust any of the Cincinnati LBS that I know
with the task. Who makes the best wheeels and how much they cost? Or do you all
make your own wheels :) ?
Mark McMaster
>
> Hey, that exactly describes the problem I'm having with my rear
> Expert.
>
> The question is what can/should I do about it? Increase the spoke
> tension? Lubricate the eyelets? Pester Mavic?
You might start by pestering Mavic, but I don't know how far you'll get
with that. Besides, there have been many reports that wheels sent back
to Mavic for repair have taken weeks (and sometimes months) to be
returned. Oiling the nipple/rim/eyelet interface should quite the noise
- but probably only temporarily. Probably the most permanent solution
is to increase the spoke tension.
You might have trouble finding a shop that is willing to do this for
you, since many shops seem to treat wheel building and repair as
voo-doo, and further seem to believe that only the manufacturers of
special wheels are capable of working on them. Proper spoke tension for
a given rim is typically inverse to the number of spokes, so low spoke
count wheels typically need very high tensions; most shops don't put
enough tension in wheels with standard numbers of spokes, so they may
not tension a low spoke count wheel high enough either.
Mark McMaster
MMc...@ix.netcom.com
Geoff Rehmet
Frederic Vailler wrote:
> My road bike came with CXP30 (32h front and rear), they are stiff but heavy and
> there is not aerodynamic advantages due to the number of spoke.
>
> I've ordered a pair of open pro (36h rear, 32 front), they are as stiff and way
> lighter, durabilty should be the same, both have made with the SUP process.
>
> Aerodynamic are nice looking, but execpt if you can ride at 30mph easelly, they
> are not usefull.
I also went through the "CXP30 or OpenPro" question, and opted for Open Pros -28
hole in the front, 32 in the back, with DT spokes. I'll probably move to the
DT Revolution spokes sometime later. A big weight saving went into the choice of
tyre though (FWIW). I like the good braking on the Open Pros (compared to
my MA40s).
Geoff.