I received a Bora One from a customer.

It's a brand new, never-ridden unit.
As a precaution against the new shaft catastrophic failure (→here),
they asked that if the right end loosens first,
I should set it up so the left end loosens first instead.


Sure enough, the right end loosened first.
If you try to loosen the left end by applying a wrench to the hollow aluminum shaft
without the right end screwed in,
it will deform easily and become unrepairable.
The right side requires the right end in place plus a 14mm wrench machined to the exact width,
and the left side requires a Wera Hex Plus 5mm allen key—without this specific combination,
you basically cannot loosen the left end when it's tightened and the right end has already come off.

I managed to loosen the left end, but it left tool marks on the rim.
I applied high-strength threadlocker to the right end and tightened it,
and on the left end I applied grease and tightened it by hand to the limit,
then gave it just a slight extra tighten with a tool,
so next time I loosen it, the left end should come loose first.

Inspection showed perfect centering with just a slight amount of runout.


The rear wheel is basically true—the rim was just slightly offset toward the freewheel side.