I wanna build a sub-1000g climbing wheelset. Just checked out XMCS rims: 360g per rim of the lowest depth (36mm), 24 holes. I believe I can talk to to Peter to customize them to 20 holes. GoldiX hubs R180SL: 250g per set
Carbon spokes: 40 total, 3g per spoke, so 120g
With this configuration, components are easily sourced but total weight is over 1000g already.
How do they do it?