Another day of wheel building (and so on).
A customer brought in a WH-R9100-24-CL rear wheel (a rare one, since it's barely selling).
We'd done a truing job on it before at our shop,
but the customer said it developed runout again pretty quickly. When I looked into it more carefully...
Without disassembling it, I'm pretty much certain the rim is warped.
While not the same final cross pair of spokes, there's an extreme tension difference between two adjacent spokes on the anti-freewheel side,
and that spoke marked "low" in the image above wobbles loosely when you shake it by hand.
If we try to tension this to something with decent stiffness,
we'd need to tension the surrounding spokes too,
but we can't tension it that much. And even if we could,
the wheel would develop radial runout too severe to ride.
The idea came up to build a wheel using this rear hub
with a Nomu Lab Wheel rim, but
for a 20H rear wheel, Nomu Lab Wheel No. 5 is too risky,
so I said to use Nomu Lab Wheel No. 1 instead.
But then, separately from that, we ended up building a Nomu Lab Wheel No. 5 rear wheel.
By the way, the customer wasn't the original owner of this WH-R9100,
and didn't acquire it by having someone pass it along either—
they bought it on Merc○ri (a Japanese marketplace app).
So anyway, I built the Nomu Lab Wheel No. 5 rear wheel.
Ebolite hub, 24H, black half-comp 4-cross lacing,
with black aluminum nipples. I'll do the dish adjustment later.
Also, I'm deducting the previous truing labor charge from the wheel price.
A customer brought in a WH-R9100-24-CL rear wheel (a rare one, since it's barely selling).
We'd done a truing job on it before at our shop,
but the customer said it developed runout again pretty quickly. When I looked into it more carefully...
Without disassembling it, I'm pretty much certain the rim is warped.
While not the same final cross pair of spokes, there's an extreme tension difference between two adjacent spokes on the anti-freewheel side,
and that spoke marked "low" in the image above wobbles loosely when you shake it by hand.
If we try to tension this to something with decent stiffness,
we'd need to tension the surrounding spokes too,
but we can't tension it that much. And even if we could,
the wheel would develop radial runout too severe to ride.
The idea came up to build a wheel using this rear hub
with a Nomu Lab Wheel rim, but
for a 20H rear wheel, Nomu Lab Wheel No. 5 is too risky,
so I said to use Nomu Lab Wheel No. 1 instead.
But then, separately from that, we ended up building a Nomu Lab Wheel No. 5 rear wheel.
By the way, the customer wasn't the original owner of this WH-R9100,
and didn't acquire it by having someone pass it along either—
they bought it on Merc○ri (a Japanese marketplace app).
So anyway, I built the Nomu Lab Wheel No. 5 rear wheel.
Ebolite hub, 24H, black half-comp 4-cross lacing,
with black aluminum nipples. I'll do the dish adjustment later.
Also, I'm deducting the previous truing labor charge from the wheel price.