This is a very light rear wheel build for clincher tires. It’s perhaps even one of the lightest clincher tire rear wheel we can meet (the record isn’t far). Here is the descriptive:
28 Cx-ray spokes, 3 times crossed on a TUNE Mag160 hub and an American Classic Sprint 350 rim;
The front wheel will follow as soon as possible, it’s a similar build with 24 spokes. The 24h AC350 rims are harder to get. It explains the longer delay.