Another wheel day (and so on).
A customer dropped off the front wheel from a Rovaal CL50 (Japanese wheel brand) for me to work on.
They wanted it rebuilt.
The CLX50 has Aerolight spokes with aluminum nipples,
while the CL50 has Aerocomp spokes with brass nipples.
So when rebuilding,
the CLX50 can reuse the spokes and
all nipples from the high spoke count side,
but the CL50 cannot reuse
any of the spokes or nipples.
The brass nipples are corroded,
which happened because sealant got inside the rim,
and the moisture from it accelerated the corrosion.
↑The valve hole area.
There's still liquid sealant remaining around the tubeless valve nut,
and you can see dried sealant that's dripped down as well.
The sealant is probably Imajey (Japanese sealant brand),
and it had penetrated even where the tape begins to curl up.
Almost all of the sealant that got inside the rim
came through this valve hole.
The end of the tape roll.
The sealant sticking to the rim's outer edge
is sealant that penetrated from inside the rim by centrifugal force,
seeping in from behind the tape.
Many of the nipples were becoming seized due to corrosion,
so carefully disassembling them was going to take
more time than building a wheel,
so I released the tension somewhat
and then cut the spokes.
This is a reference measurement.
After this, I soaked the rim in water
to flush out all the sealant-mixed liquid,
and removed a considerable amount of
sealant buildup around the valve hole that looked like yuba (tofu skin),
so if I'd weighed it at that point,
it probably would have been a bit lighter.
Rebuilt it.
CX-RAY on the high spoke count side, CX Sprint on the low spoke count side.
I'll do the lacing later.
Unusually for a Rovaal front wheel,
the bearing rotation wasn't cloudy.
A customer dropped off the front wheel from a Rovaal CL50 (Japanese wheel brand) for me to work on.
They wanted it rebuilt.
The CLX50 has Aerolight spokes with aluminum nipples,
while the CL50 has Aerocomp spokes with brass nipples.
So when rebuilding,
the CLX50 can reuse the spokes and
all nipples from the high spoke count side,
but the CL50 cannot reuse
any of the spokes or nipples.
The brass nipples are corroded,
which happened because sealant got inside the rim,
and the moisture from it accelerated the corrosion.
↑The valve hole area.
There's still liquid sealant remaining around the tubeless valve nut,
and you can see dried sealant that's dripped down as well.
The sealant is probably Imajey (Japanese sealant brand),
and it had penetrated even where the tape begins to curl up.
Almost all of the sealant that got inside the rim
came through this valve hole.
The end of the tape roll.
The sealant sticking to the rim's outer edge
is sealant that penetrated from inside the rim by centrifugal force,
seeping in from behind the tape.
Many of the nipples were becoming seized due to corrosion,
so carefully disassembling them was going to take
more time than building a wheel,
so I released the tension somewhat
and then cut the spokes.
This is a reference measurement.
After this, I soaked the rim in water
to flush out all the sealant-mixed liquid,
and removed a considerable amount of
sealant buildup around the valve hole that looked like yuba (tofu skin),
so if I'd weighed it at that point,
it probably would have been a bit lighter.
Rebuilt it.
CX-RAY on the high spoke count side, CX Sprint on the low spoke count side.
I'll do the lacing later.
Unusually for a Rovaal front wheel,
the bearing rotation wasn't cloudy.