semi aero 700c rims

"andy" <trifox13atcovaddotnet> wrote in message
"]news:[email hidden]...

Quoted message said:

Been following the thread on rims and was wondering what
everyone's

thoughts

Quoted message said:

are on semi-aero rims such as mavic cxp33 and velocity
aeroheads. Any real aero advantages? What about the
aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The
aeroheads are much cheaper and lighter too. Thanx in

advance.

Quoted message said:

andy

I recently bought some Aeroheads and I really like them. I
like the offset rim for the rear. I have Conti tyres on and
it's a great combo.

Marty

"andy" <trifox13atcovaddotnet> wrote in message news:<[email hidden]>...

Quoted message said:

Been following the thread on rims and was wondering what
everyone's thoughts are on semi-aero rims such as mavic
cxp33 and velocity aeroheads. Any real aero advantages?
What about the aerohead(19.5mm) vs. cxp33(23.5mm)
sidewalls? The aeroheads are much cheaper and lighter too.
Thanx in advance. andy

Not necessarily cheaper to those with an eye for a bargain.
ital-tecno.com has cxp-33's for ~ $50 each, which is about
what you will pay for the aeroheads and the 33 is a much
better rim for the heavier rider.

If you want light and long term durability is not a
major concern, the aeroheads are the better choice
between the two.

App

In article
<[email hidden]>,
trifox13atcovaddotnet says...

Quoted message said:

Been following the thread on rims and was wondering what
everyone's thoughts are on semi-aero rims such as mavic
cxp33 and velocity aeroheads. Any real aero advantages?
What about the aerohead(19.5mm) vs. cxp33(23.5mm)
sidewalls? The aeroheads are much cheaper and lighter too.
Thanx in advance.

No real aero advantages unless you use less spokes.
--------------
Alex

Quoted post said:

Originally posted by Andy
Been following the thread on rims and was wondering what
everyone's thoughts are on semi-aero rims such as mavic
cxp33 and velocity aeroheads. Any real aero advantages? What
about the aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The
aeroheads are much cheaper and lighter too. Thanx in
advance. andy

No significant aero advantages either way.
CXP33 is slightly heavier due to the small nipple cradling castings that are held by the spoke holes with the "spring material" that is between the inner and outer rim walls.
I have built both. CXP33 is slightly easier to build because you can just drop the nipples in the spoke holes, but the OCR version of the Aerohead gives it a durability edge for rear wheels. You can also get Velocity Aerohead rims without machining on the brake surface. My experience is limited to a couple of samples, but I like the option of not having any material removed by a machine that will effect the life of the rim in use.
If you want aero advantages, use Velocity Deep V, fewer spokes, and get wind tunnel tested for aero riding position.

daveornee said:

CXP33 is slightly easier to build because you can just
drop the nipples in the spoke holes...

That's a nice feature. The Aerohead has no eyelets or
ferrules, and the nipple is easily lost in the rim. Of
course, it's pretty easy to get out, but it's a bit of a
pain in the butt.

Quoted message said:

...but the OCR version of the Aerohead gives it a
durability edge for rear wheels.

I build an Aerohead OCR rear wheel a few weeks back. That
offset spoke bed makes the rear wheel much easier to build.
I can't give an opinion on durability since I haven't ridden
them for very long.

Quoted message said:

You can also get Velocity Aerohead rims without machining
on the brake surface. My experience is limited to a couple
of samples, but I like the option of not having any
material removed by a machine that will effect the life of
the rim in use.

Yes, you can get the Aerohead without machined sides. And
you can get them powdercoated instead of anodized. But you
can't get them with both of these features. That is, the
powdercoated walls all have machined sidewalls. Or so I was
told. I guess it makes some sense, since I don't think the
brakes would work very well as long as the powdercoating was
still on the sides.

They also don't have welded joints. I like that because it
should be cheaper and I don't see the advantage of welding.
The powdercoated versions come in red, yellow or blue. I
don't like that, since I like to keep the rims pretty low-
key so they can be used on different bikes.

--
Dave, who has yellow rims dvt at psu dot edu