Another day with wheels (and so on...).
Built up a front wheel from Nomu Lab Wheel 2.5 and a rear wheel from the 3 series.
The 3 series rear wheel is semi-competition (half-comp).
The sprocket was customer-supplied,
and I glued on a Continental Competition 19 tire
using rim cement.
With Continental Competition tires,
there's a difference in inner diameter between the 22C and 19C.
The 22C is clearly slightly larger.
Specifically, the 22C can be mounted on the wheel
right out of the package (in my case),
but the 19C is difficult to mount immediately without a tire lever.
Or perhaps, even if the inner diameter is the same,
changing the thickness affects how easily it mounts on the rim.
When mounting both the 19C and 22C tires onto the rim
you deform the tire's outer shape,
but the amount of that change might be "the narrower, the less deformation = harder to fit".
（Not yet verified）
Built up a front wheel from Nomu Lab Wheel 2.5 and a rear wheel from the 3 series.
The 3 series rear wheel is semi-competition (half-comp).
The sprocket was customer-supplied,
and I glued on a Continental Competition 19 tire
using rim cement.
With Continental Competition tires,
there's a difference in inner diameter between the 22C and 19C.
The 22C is clearly slightly larger.
Specifically, the 22C can be mounted on the wheel
right out of the package (in my case),
but the 19C is difficult to mount immediately without a tire lever.
Or perhaps, even if the inner diameter is the same,
changing the thickness affects how easily it mounts on the rim.
When mounting both the 19C and 22C tires onto the rim
you deform the tire's outer shape,
but the amount of that change might be "the narrower, the less deformation = harder to fit".
（Not yet verified）