Maxx, that is cool!.
The rim is labeled Ranger, fwiw, but yeah, it's actually labeled with the ERD. How nice... I wish the hub was, too. And speaking of "hub", it's listed as a SuperStock Disc, which is fine except every SuperStock Disc I've seen says it's got 28H. Mine has 32H so who knows what it really is? But seeing how my front spokes are 292mm (maybe 293mm, sure), then your figure of 293mm/289mmm sounds pretty reasonable.
I wish I brought in the rough hub dimensions I took last night, I won't trust my memory at this point.