So I'm looking to build a new wheel with a Origin8 TH51 Pro Pulsion 32H and I'm having a hard time finding the diameter of the ring of spoke holes AND the width between the flanges. I'd like to order spokes at the same time and need it for my calculations

https://www.jbimporters.com/web/check...htirutl4sm3rm7

Any leads?

The best way to find out something like that is contact the rim manufacturer. I know Velocity keeps information like that about various hubs (formula for sure).