Another wheel day (and so on).
A customer brought in a rear wheel built with a 7700 Dura-Ace hub and
Open Pro rim.
They're requesting a rebuild.
The rim is Open Pro, but all the stickers had been peeled off.
On the opposite side of the valve hole, on rims like Ksyrium and such,
there's a yellow rectangular sticker with the ETRTO and country of manufacture
covering the rim outside the brake zone,
but that also serves to hide the weld finishing on this section.
FH-7700 32H 15-base
Revolution lacing, Italian style.
The spoke weight ratio is equivalent to
Revolution on 14-base and Sapim CX-RAY,
so these spokes are lighter than those.
The spoke tension was quite firm for the spoke gauge,
and the deformation on the non-drive side
was less compared to the drive side for a symmetrical 32-spoke build.
↑This is the drive-side flange.
There are traces from previous wheel builds on this hub,
and based on the spoke seating marks,
it appears to have been laced in reverse Italian or reverse JIS style.
Both Italian and JIS lacing
have the same spoke direction on the drive side,
so if there's only a history of proper lacing,
marks in this direction would absolutely never appear.
The drive-side flange currently has spoke marks where the current spokes pass through,
and the non-drive-side flange has
spoke marks in the opposite porcupine direction (viewed from the right side of the wheel)
in the hole currently used for non-drive spokes,
so whether it's from the previous or previous-previous build is unclear,
but it appears it was once laced in reverse JIS style.
I kind of suspected as much.
For a normal wheel,
the difference in spoke deformation between left and right
seemed smaller than usual,
but if the rim is offset this much toward the non-drive side, that's naturally what happens.
However, this is the kind of
center-offset that you'd notice just by mounting it on the frame.
The spokes are super lightweight,
but the nipples are made of brass for some reason.
There's severe radial runout toward the outer edge,
and there's only one spot on the truing stand gauge where it
hits with a hard clunk, at the position shown in the image above,
at all other positions there's this much gap.
This might be hard to convey, but it's quite severe radial runout.
However, I later noticed a symptom that might be the cause of this.
I took another look at the flanges.
This is personally a pretty remarkable photo.
DT spoke stamps have a design where a capital T appears to pierce through a capital D,
but current production is all stamped with recessed lettering.
However, this wheel's Revolutions mixed in some from long ago
with raised-letter stamping.
I loosened the spokes to a certain degree before cutting them.
The image above is from a location where the nipple wasn't loosened at all.
Mavic used to publish specifications for their rims paired with
Shimano hubs in 32H 6-pack lacing, stating this length,
I can rattle off from memory: front 296mm, rear right 294mm, rear left 295mm,
and my calculation formula results are nearly identical to those.
Whether they knew that or not, with this wheel,
instead of lazily making both sides the same length,
they properly built it with 294mm and 295mm.
So the spoke and nipple end faces line up nicely,
but in the image above, there are spokes where the threads
protrude about 2.5 threads from the end face.
↑This one also has the nipple completely unloosened.
This is the "unyo-n" state where the material has yielded and
the nipple rotation has converted from pulling the spoke tension
to stretching instead.
I thought it was well-tensioned for 15-base Revo,
but it's been a while since I've seen unyo-n.
I couldn't say for certain, but
the extreme radial runout from earlier
might have been at this spoke hole position on the rim.
Since the spoke was only protruding this far from the nipple at this one location,
it seems to match up.
Built
it
anew.
Despite that severe radial runout, it had apparently been used,
and when rotating the wheel,
the wear mark from when it was once perfectly round,
acquired at that runout brake zone,
now dances up and down
within the brake zone of the newly built rim.
32H half-competition 48-pack lacing with silver aluminum nipples.
Spoke wrapping comes later.
It's 48-pack lacing rather than 46-pack
because that's what the customer requested.
Depending on rim depth, Dura-Ace hub 32H 8-pack lacing
has virtually no interference between drive-side and non-drive-side spoke heads.
A customer brought in a rear wheel built with a 7700 Dura-Ace hub and
Open Pro rim.
They're requesting a rebuild.
The rim is Open Pro, but all the stickers had been peeled off.
On the opposite side of the valve hole, on rims like Ksyrium and such,
there's a yellow rectangular sticker with the ETRTO and country of manufacture
covering the rim outside the brake zone,
but that also serves to hide the weld finishing on this section.
FH-7700 32H 15-base
Revolution lacing, Italian style.
The spoke weight ratio is equivalent to
Revolution on 14-base and Sapim CX-RAY,
so these spokes are lighter than those.
The spoke tension was quite firm for the spoke gauge,
and the deformation on the non-drive side
was less compared to the drive side for a symmetrical 32-spoke build.
↑This is the drive-side flange.
There are traces from previous wheel builds on this hub,
and based on the spoke seating marks,
it appears to have been laced in reverse Italian or reverse JIS style.
Both Italian and JIS lacing
have the same spoke direction on the drive side,
so if there's only a history of proper lacing,
marks in this direction would absolutely never appear.
The drive-side flange currently has spoke marks where the current spokes pass through,
and the non-drive-side flange has
spoke marks in the opposite porcupine direction (viewed from the right side of the wheel)
in the hole currently used for non-drive spokes,
so whether it's from the previous or previous-previous build is unclear,
but it appears it was once laced in reverse JIS style.
I kind of suspected as much.
For a normal wheel,
the difference in spoke deformation between left and right
seemed smaller than usual,
but if the rim is offset this much toward the non-drive side, that's naturally what happens.
However, this is the kind of
center-offset that you'd notice just by mounting it on the frame.
The spokes are super lightweight,
but the nipples are made of brass for some reason.
There's severe radial runout toward the outer edge,
and there's only one spot on the truing stand gauge where it
hits with a hard clunk, at the position shown in the image above,
at all other positions there's this much gap.
This might be hard to convey, but it's quite severe radial runout.
However, I later noticed a symptom that might be the cause of this.
I took another look at the flanges.
This is personally a pretty remarkable photo.
DT spoke stamps have a design where a capital T appears to pierce through a capital D,
but current production is all stamped with recessed lettering.
However, this wheel's Revolutions mixed in some from long ago
with raised-letter stamping.
I loosened the spokes to a certain degree before cutting them.
The image above is from a location where the nipple wasn't loosened at all.
Mavic used to publish specifications for their rims paired with
Shimano hubs in 32H 6-pack lacing, stating this length,
I can rattle off from memory: front 296mm, rear right 294mm, rear left 295mm,
and my calculation formula results are nearly identical to those.
Whether they knew that or not, with this wheel,
instead of lazily making both sides the same length,
they properly built it with 294mm and 295mm.
So the spoke and nipple end faces line up nicely,
but in the image above, there are spokes where the threads
protrude about 2.5 threads from the end face.
↑This one also has the nipple completely unloosened.
This is the "unyo-n" state where the material has yielded and
the nipple rotation has converted from pulling the spoke tension
to stretching instead.
I thought it was well-tensioned for 15-base Revo,
but it's been a while since I've seen unyo-n.
I couldn't say for certain, but
the extreme radial runout from earlier
might have been at this spoke hole position on the rim.
Since the spoke was only protruding this far from the nipple at this one location,
it seems to match up.
Built
it
anew.
Despite that severe radial runout, it had apparently been used,
and when rotating the wheel,
the wear mark from when it was once perfectly round,
acquired at that runout brake zone,
now dances up and down
within the brake zone of the newly built rim.
32H half-competition 48-pack lacing with silver aluminum nipples.
Spoke wrapping comes later.
It's 48-pack lacing rather than 46-pack
because that's what the customer requested.
Depending on rim depth, Dura-Ace hub 32H 8-pack lacing
has virtually no interference between drive-side and non-drive-side spoke heads.