I've now twice had the body of the rear hub destroyed during bikepacking racing (999 Miglia 2017 and Race Around Denmark 2018).
I'm currently using Zipp 303 Disc with 177D hubs from 2016 and it seems they can't take the load. I'm "only" 66 kg, but the bike is heavy during these races.
Should I rebuild the rear wheel with a sturdier hub or change wheels when participating in ultra-distance unsupported (hence the heavy bags) races?
Zipp user manual: https://www.zipp.com/_media/pdfs/manuals/2016_ZIPPSPCRevA.pdf