Another day of wheels (and so on).
A customer gave me a Mavic A1022 rim to work with.
It's a tubeless-ready aluminum disc brake rim.
This one isn't too bad,
but when stickers are placed where they overlap the top edge of the rim sidewall,
it makes wheel building and truing difficult,
so I'd prefer if people didn't do that.
This is a separate matter—a Cosmic SLR45 wheel—
I took this photo to write about how stickers shouldn't go this far,
but looking at it now, it's not really that bad either.
Since it's made in France, it's written in French.
Pinarello frames once didn't say "Made in Italy" either—
they said "Fatta de Italia" in Italian to indicate it was made in Italy.
The traditional Open Pro rim
remained French-made, perhaps because of the cost to keep production equipment running,
but other rims for complete wheels,
rims sold individually,
and the assembly of complete wheels
moved to Romania.
I thought Mavic would never manufacture new rims in France again,
but it seems the high-end models are different.
The Open Pro disc rim that came before this one is also French-made,
so this isn't the first French-made rim since they established manufacturing in Romania, but still.
↑The side where the rim sidewall between spoke holes slopes more gently
↑The side where the rim sidewall between spoke holes slopes more steeply
Though it's hard to see at first glance,
the rim sidewall shape between spoke holes differs left and right—
the area around the spoke holes is bulged,
so the unevenness of the rim varies subtly side to side.
With the Open Pro disc rim this is easier to notice because the finish is glossy,
but the Open Pro disc rim has an asymmetrical shape
while the spoke holes themselves are drilled centrally at equal spacing,
so structurally it's not an offset rim (→see here).
However, complete wheels made with the same Open Pro disc rim
are always assembled with the side where the rim sidewall slopes more gently
paired with the side where the hub flange is narrower,
and the side where the spoke angle is steeper on the same side.
If you get this relationship between rim and hub wrong,
the left-right spoke tension difference doesn't change,
but it feels awkward and inelegant.
We have one pair of such wheels in the shop right now,
and for some reason both front and rear are reversed.
It wasn't done with any particular intention—
the builder just didn't notice the rim shape was different
and happened to flip one half twice in a row.
The A1022 rim has offset spoke holes.
In the image above, the spoke holes on both sides of the valve hole
are both lower than the valve hole, so they're offset,
and more specifically, the left spoke hole is offset lower than the right one, making it a proper offset drilling.
And when building front and rear wheels separately,
there were instructions printed on the rim specifying which side should be the disc rotor mount.
↑This is the Open Pro disc rim wheel I mentioned earlier,
which a customer (arguably) gave me to work with,
saying they only wanted the hub back—the rim wasn't needed.
（Guess showing the serial number is fine）
Nowhere on the rim does it specify the orientation when building the wheel.
By the way, the A1022 specifies Spoke Bed Diameter,
while the Open Pro disc specifies ERD (Effective Rim Diameter),
and SBD and ERD define different ranges of length.
The A1022 rim's stated SBD of 598 would convert to ERD of 600–600.5mm,
but my actual measured value for building this rim was 597.3mm,
which is closer to the general meaning of ERD.
I don't know... this is confusing.
Well, regardless of what's written on the rim, I trust nothing
and just measure everything myself.
Built.
ZTTO
R2 straight-pull disc hub,
24H, black semi-CX sprint, forced 2-cross lacing both sides.
Nippling will be done later.
A customer gave me a Mavic A1022 rim to work with.
It's a tubeless-ready aluminum disc brake rim.
This one isn't too bad,
but when stickers are placed where they overlap the top edge of the rim sidewall,
it makes wheel building and truing difficult,
so I'd prefer if people didn't do that.
This is a separate matter—a Cosmic SLR45 wheel—
I took this photo to write about how stickers shouldn't go this far,
but looking at it now, it's not really that bad either.
Since it's made in France, it's written in French.
Pinarello frames once didn't say "Made in Italy" either—
they said "Fatta de Italia" in Italian to indicate it was made in Italy.
The traditional Open Pro rim
remained French-made, perhaps because of the cost to keep production equipment running,
but other rims for complete wheels,
rims sold individually,
and the assembly of complete wheels
moved to Romania.
I thought Mavic would never manufacture new rims in France again,
but it seems the high-end models are different.
The Open Pro disc rim that came before this one is also French-made,
so this isn't the first French-made rim since they established manufacturing in Romania, but still.
↑The side where the rim sidewall between spoke holes slopes more gently
↑The side where the rim sidewall between spoke holes slopes more steeply
Though it's hard to see at first glance,
the rim sidewall shape between spoke holes differs left and right—
the area around the spoke holes is bulged,
so the unevenness of the rim varies subtly side to side.
With the Open Pro disc rim this is easier to notice because the finish is glossy,
but the Open Pro disc rim has an asymmetrical shape
while the spoke holes themselves are drilled centrally at equal spacing,
so structurally it's not an offset rim (→see here).
However, complete wheels made with the same Open Pro disc rim
are always assembled with the side where the rim sidewall slopes more gently
paired with the side where the hub flange is narrower,
and the side where the spoke angle is steeper on the same side.
If you get this relationship between rim and hub wrong,
the left-right spoke tension difference doesn't change,
but it feels awkward and inelegant.
We have one pair of such wheels in the shop right now,
and for some reason both front and rear are reversed.
It wasn't done with any particular intention—
the builder just didn't notice the rim shape was different
and happened to flip one half twice in a row.
The A1022 rim has offset spoke holes.
In the image above, the spoke holes on both sides of the valve hole
are both lower than the valve hole, so they're offset,
and more specifically, the left spoke hole is offset lower than the right one, making it a proper offset drilling.
And when building front and rear wheels separately,
there were instructions printed on the rim specifying which side should be the disc rotor mount.
↑This is the Open Pro disc rim wheel I mentioned earlier,
which a customer (arguably) gave me to work with,
saying they only wanted the hub back—the rim wasn't needed.
（Guess showing the serial number is fine）
Nowhere on the rim does it specify the orientation when building the wheel.
By the way, the A1022 specifies Spoke Bed Diameter,
while the Open Pro disc specifies ERD (Effective Rim Diameter),
and SBD and ERD define different ranges of length.
The A1022 rim's stated SBD of 598 would convert to ERD of 600–600.5mm,
but my actual measured value for building this rim was 597.3mm,
which is closer to the general meaning of ERD.
I don't know... this is confusing.
Well, regardless of what's written on the rim, I trust nothing
and just measure everything myself.
Built.
ZTTO
R2 straight-pull disc hub,
24H, black semi-CX sprint, forced 2-cross lacing both sides.
Nippling will be done later.