A customer left me a Spinergy Zero Light wheelset to work on.


These aren't originally a matched pair—
the front wheel has an aluminum rim while the rear is a carbon model.
Both are WO-spec rims.
The rear wheel's spokes are laced tangentially on both sides, but
the anti-freewheel side flexes noticeably when pressed,
so when I checked the freewheel side to keep things centered while tensioning,
it's cranked up tight with no room for adjustment beyond fine-tuning.
It doesn't look like much to the eye, but the Zero Light is
a wheel where the left-right spoke deflection difference is quite large.

The front wheel had perfect centering but significant runout,
while the rear was almost runout-free but the center was off.

I worked the runout out of the front wheel in multiple places and slight centering issues emerged,
so I recentered after truing,
but with the rear wheel, as I did single-sided truing to reduce the centering error,
the center sorted itself out naturally.
I've written about this countless times before, but when you're actually fixing a wheel,
centering error is "often easier to fix when it's present."