I took in a ZIPP (aerodynamic wheel manufacturer) 303 from a customer.
Starting with the rear wheel. There was noticeable lateral runout and
the center was off, so
I fixed it.
Next, the front wheel.
Virtually no runout, but the center was off.
Also, the orientation of the right-side cone locknut on the hub wasn't aligned with the left side, so I corrected that. This hub has end nuts with an aerodynamic wing-section profile on the front wheel's left and right sides and the rear wheel's left side. The instructions specify that the wheels should be fixed with the flat, rounded side of the split end nut facing forward and the tapered, pointed side facing backward. On the front wheel, the orientation is randomly determined by the left-side cone adjustment, so afterward the right-side end nut is fixed in the same phase as the left side.
I centered and trued the wheels. Since this customer isn't the original owner of this wheel, the detailed history is unknown. But the front tire was glued on with tubular tape while the rear tire was glued on with rim cement. What's puzzling is that the front wheel showed no trace of ever having rim cement applied, yet the rear wheel's cement bed was extremely thick and solid. Removing it completely with acetone (which is necessary when switching to tape) was not so much impossible as extremely difficult. The customer had also requested new tires be installed, but I mounted them with tape on the front and cement on the rear.
Starting with the rear wheel. There was noticeable lateral runout and
the center was off, so
I fixed it.
Next, the front wheel.
Virtually no runout, but the center was off.
Also, the orientation of the right-side cone locknut on the hub wasn't aligned with the left side, so I corrected that. This hub has end nuts with an aerodynamic wing-section profile on the front wheel's left and right sides and the rear wheel's left side. The instructions specify that the wheels should be fixed with the flat, rounded side of the split end nut facing forward and the tapered, pointed side facing backward. On the front wheel, the orientation is randomly determined by the left-side cone adjustment, so afterward the right-side end nut is fixed in the same phase as the left side.
I centered and trued the wheels. Since this customer isn't the original owner of this wheel, the detailed history is unknown. But the front tire was glued on with tubular tape while the rear tire was glued on with rim cement. What's puzzling is that the front wheel showed no trace of ever having rim cement applied, yet the rear wheel's cement bed was extremely thick and solid. Removing it completely with acetone (which is necessary when switching to tape) was not so much impossible as extremely difficult. The customer had also requested new tires be installed, but I mounted them with tape on the front and cement on the rear.