I built up a Mavic Cosmic Carbon 80 rim.

The spoke holes on the rim are evenly spaced, and since you don't need special spokes,
it's possible to build it as a hand-built wheel.


The Tni Evolution hub has low-resistance bearing rotation, and
for a standard hub it's got quite high flanges, making it really useful for hand-built wheels.


It says "20R" but I wonder what that means.
It seems like it must mean something.


↑With tubular tires, depending on the model, the side that glues to the rim
can have raised stitching. There's a groove in the rim—
this is to accommodate that bulge.


The nipples are the type that protrude from the rim. Looks easy to maintain.