On May 8, 9:43=A0pm, Colin Campbell <cmca...@[EMAIL PROTECTED]
> wrote:
> joseph.santanie...@[EMAIL PROTECTED]
wrote:
> > Hi All,
>
> > I recently bought some pre-built wheels which turned out to not really
> > be up to the task. So now I am going to build some replacements.
>
> > First a little background on wheels I have and their various strengths
> > and weaknesses.
>
> > The pre-builts had 20 bladed radial spokes in front, 24 2x bladed
> > back. The rear hub had high and narrow flanges. The rear felt ok
> > (until I broke the freehub), but the front was too flexible. The
> > brakes would rub when I stood. These had 50mm deep aero section.
>
> > My every-day wheels are 28 2x front, 32 3x back. Ultegra hubs,
> > Velocity Deep-V rims. Those are rock solid and plenty stiff. Just not
> > very aero, and heavy.
>
> > I have also a set of lightweight tubulars which are 28 radial front,
> > 28 back 2x drive side, radial NDS. These are on American Classic hubs
> > which are very narrow with virtually no dish, so the radial NDS is
> > probably dumb. These wheels are very light, but the rear has a
> > disconcerting springiness to it. My suspicions are that the narrow
> > flange spacing and radial NDS are the main culprits. I only mention
> > these wheels are evidence of why I am skeptical of radial NDS.
>
> > So on to the new wheels. The rims are 28h 50mm deep carbon. 32 was not
> > available. The hubs are Dura Ace 7800. Dura Ace have wider flanges
> > than the AC, so I'm not too worried about the wheels being too floppy.
> > I want aero, but also I want solid out of saddle feel like my Deep-
> > V's.
>
> > But the question is whether radial up front will provide a more
> > laterally stiff wheel, or should I go with 2x? Spokes wil be CX-Ray.
> > On the rear, it will be 2x drive side, but what about radial NDS? Is
> > there any real reason I should do that? Any reason not to use CX-Ray
> > on all 28, or should drive side be different? Rider weight 205lbs.
>
> > Joseph
>
> Joseph,
> Be sure you weigh the wheels you have, including the "every day" wheels.
>
> I was surprised recently to learn that my shop-built wheels on one bike
> were NOT tons heavier than the pair of Bontrager Race Lite wheels that I
> recently took off of the other bike. =A0I only got as far as weighing
the
> rear wheels, but the Campy Record/32 DT Swiss spoke/Velocity AeroHead
> wheel with the Record cassette on it was only 90 grams heavier than the
> 24 spoke Race Lite, without a cassette. =A0Unless the Ti/Steel cassette
is=
> awfully light, I was going to do a swap and end up with a heavier rear
> wheel and bike.
>
> Now I'm reduced to switching from wire bead Vittoria Rubinos to folding
> Rubino Pros to save any more weight. =A0There are 160 grams to be gained
> there.
>
> I may have to start eating carefully again....
My Ultegra/Deep-V's aren't that bad, but my lightweight set (built
myself) beats them by about 1100g!
The new ones I'll be making with the DA hubs will be well heavier than
those, but still quite a bit lighter than the every day wheels. But
most im****tantly, they will be much more aero. Once done, I will have
3 wheelsets each with a distinct character: rugged, light, aero.
Joseph
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