A customer brought in the rear wheel of a Shamal Ultra for repair.

When customers bring in just one wheel from the front or rear pair,
it usually follows the pattern of being a problem obvious enough
that even an amateur can see it clearly.
Sure enough, both left and right had serious runout.
I even suspected rim deformation.

With wheels that have significant runout in both directions,
the provisional centerline before work sometimes can't be relied upon,
but in this case, beyond the left-right runout,
the entire rim was shifted heavily toward the freewheel side, which actually helped.
I was able to tension the non-freewheel side quite a bit.

The cause of the runout was a crash.
Because it was shifted so far to the freewheel side,
I actually asked the customer if they'd done any truing work before bringing it in.
They said they hadn't touched anything.

The truing took quite a long time,
but it came out beautifully—like a new wheel hanging straight from the stand.




↑On the freewheel-side spokes in the direction of the porcupine,
there are identical rub marks at the same location—
these are contact marks from the rear derailleur pulley cage.
The Shamal Ultra's freewheel-side spokes don't protrude outside the hub flange,
so this kind of contact should be quite unlikely. The fact that it's still rubbing
suggests there's a possibility the frame dropout might be bent, which I did mention to the customer.
Since they only brought the wheel itself, there wasn't much more I could do about it.