I received a ZIPP 303 (aerodynamic wheel set) from a customer.


They wanted me to check the rim straightness and centering, do some retightening if possible,
and inspect the hubs.
The rim straightness and centering were pretty much fine.
I wanted to retighten the rear wheel,
but the freewheel side tension was already maxed out, so I gave up on that.


The bearings in the rear hub had one side with slightly rough rotation, so I replaced it.
Though it wasn't absolutely critical—there was just a noticeable difference between the two sides,
so I replaced the slightly rougher one with a new bearing.
I didn't throw away the removed bearing and actually gave it to the customer as a spare,
since the wear was extremely minimal.

I dialed in the hub cone bearing adjustment quite precisely.
When I tighten the locknut with the locking screw, the rotation gets slightly heavier,
so I start from a slightly loose position to account for that.
The final adjustment of this locknut is just a faint quarter-turn or so,
which is probably only about 1° of rotation.
So there's no way to get ideal bearing adjustment with the current Dura-Ace hub
when you can only adjust in 9° increments.