Originally Posted by
SquidPuppet
My unsolicited two cents.

You can find the ERD at the manufacturers website. That said, I personally won't use the published ERD to determine spoke length. For a variety of reasons, a rims ERD can vary a tiny bit from one production run to another. And when it comes to spoke length, we all know that tiny bits can be the difference between "just right" and "wont work".
I agree 100%. Its a convenience thing for me more than anything else, and I get agitated when I can't find what I'm seeing in my mind's eye.
Originally Posted by
SquidPuppet
Wise.
That way, when I sell a bike there are no excuses needed and none given. Full disclosure all the time and every time.