Nomu Lab Diary

The Evil Cosmos and Racing Zero Carbon

To clarify, the "evil" in the title applies only to the Cosmos—
the Racing Zero Carbon is not evil.
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↑The evil Cosmos
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↑Racing Zero Carbon (rebuilt)

These two wheels have no direct connection,
but they both belong to friends of mine (different owners).

First, about the Cosmos—
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It's built with a 6600 Ultegra 28H hub in half-comp 4-cross lacing.
The front wheel is built with a 6600 24H front hub
and a 24H Cosmos rim,
and that's because Ultegra hubs came in 24H back then
and the Cosmos rim had a 24H size that the Open Pro didn't have,
so we built a wheel like this.
But here's the thing—the Cosmos rim is a part from complete wheelsets,
and repair parts, spare parts, and small parts
are sourced for repairing the original products,
not for building these kinds of "evil wheels."

There was once a wheel called the Cosmic Carbon 80,
but production fell behind the year it was announced in the catalog,
so it got pushed to the following year (※).
However, the part number for the spare rim was determined,
so at the time I ordered both the wheel itself and a spare rim.
Asking for a replacement rim when a "Cosmic Carbon 80 with a broken rim
absolutely does not exist"—that's pretty evil, isn't it?
I was definitely planning to build an evil wheel.

※Campagnolo's Bullet didn't come out the year it was announced either.
The original catalog had
"Ball-bearing Bullet in 80mm and 105mm heights
that only actually came out in USB or CULT Bullet Ultra,
and tubeless (2WAY-FIT) models"
that ended up never being released,
and with both regular and dark labels available,
the variety became absolutely ridiculous.

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On the non-drive side I did double cross (lacing the second-to-last crossing too),
but spoke breakage risk goes up noticeably, so I don't do it much anymore.

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The Cosmos rim has the same cross-sectional shape as the MA3, the lower-tier model below the Open Pro,
but they apparently do machine them separately—the weight is much lighter than MA3
and just barely heavier than the Open Pro.
If you gather a decent sample of each and scrutinize them,
the lightest Cosmos rim would probably end up being lighter than the heaviest Open Pro.
That's the magnitude of the difference.

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↑I put marks at different heights on the front and back of the Comp spokes
this is to see whether the spoke is rotating when I turn the nipple.
I mark both sides so the wheel can be placed in the truing stand either way.
Ah, how nostalgic. These days I don't have to do this anymore.
As for timing, I don't think any of the Nomu Lab wheels have these marks.

So why are this evil Cosmos and the Racing Zero Carbon
in the same article? Well...
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The Racing Zero Carbon that I disassembled once (→here)
broke its rear wheel right away.
Day 4 of purchase, 1st use at the Western Japan Corporate Championships (Hiroshima),
after a crash, someone stepped on the rear wheel
and the rim broke.

The specimen that probably holds the world record for fastest rim weight teardown
probably also holds the world record for fastest rim destruction...
Wonderful.

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The fact that I removed one spoke from the drive side and one from the non-drive side
is something I did for a separate research project—
it's not related to the crash.

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Leave the rim structural analysis to me—
バリバリ
Stop it! (AA sketch omitted

When it was brought in, it wasn't peeled back this far,
but it was doomed anyway, so I heartlessly peeled it back myself.
If this were my own wheel,
I might agonize over fixing the delaminated part with epoxy...
but I don't want to die, so I'll pass.
And if it's a customer's wheel (nominally), no need to say more.

They want me to order a replacement rim for this and get it fixed,
but the rim alone costs quite a bit, so when I thought about it—
you've already had plenty of fun with it
(not sure if that's pronounced "じゅうぶん" or "じゅっぷん")
—I said, but we're going ahead with ordering the rim anyway.

The problem here is,
if I order a Racing Zero Carbon rim at this timing,
Campagnolo Japan might think
"Did Nomu Lab order a Racing Zero Carbon rim single as a spare
to build an evil wheel?"
Telling them that the Racing Zero Carbon is already broken
might not be very convincing.
So that's why I'm writing this article.
Hey, are you reading this?
It really is broken, I swear.

Creating a frankensteined "Racing 1 Carbon" by swapping in the rear rim
from the late-model Racing 1 with rim spoke phase "right, left, right, rest ×7 repeats"—
I never dreamed of doing such a thing.

As for the rim delivery time,
with Racing Zero Carbon itself experiencing delayed and delayed delivery
amid a supply shortage,
it's hard to imagine spare rims would arrive promptly.

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Sorry, it arrived in normal lead time

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↑New rim weight.

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21 nipples

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21 spokes (the 14 pointing right in the image are from the drive side)

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Hub alone (2nd time in 2 months)

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Built.
(Same as the 2nd image at the top)
When I rebuilt it before,
I took the slightly slacker of the two pairs I had
and retensioned it with a slight increase to match the other,
so this time I haven't tensioned it any higher than that.