Sorry to add the myriads of posts regarding spoke lengths. I did a search, but didn't see anything specific to what I encountered.
I was attempting to lace the following:
Rim: Kinlin XR-300
Hub: Shimano Tiagra Rear Hub FH-4500 32h
3-cross both NDS and DS
Hub specs are as follows:
ERD for Kinlin XR-300 lists as: 577
I always want to double-check ERD myself when I receive the rim, especially as it can vary a bit from different size nipples. When measuring multiple spots on the using a 12mm nipple, my ERD came out to 581.
As a result, using spocalc with hub specs above, I got 282mm for drive side and 284mm non-drive side.
When attempting to lace with the above lengths, the spokes were too long (spokes went all the way through the nipples until there was no more threading). It seems like 280mm and 282mm would have sufficed, which would have been the lengths if I in fact used ERD 577.
Any idea where I went wrong in either my ERD measurement or use of spocalc?
Thanks everyone and Merry Christmas!