you're kind of going about this the wrong way.

The #1 thing is that the cog is in the optimal position for perfect chainline. Use the spacers to achieve good chainline and don't worry about where the flanges are.

Once you've got the chainline, take the hub off and do your measurements.

The flanges don't need to be centered on the frame. The Rim does.


an like miamijim said, you are kind of overthinking this. All this moving around of spacers and stuff...its not gonna change the spoke length calculations significantly. There's enough fudge factor room on a spoke. Get your spokes and get yer wrench.