Originally Posted by
Kontact
No, I still have no idea what step two is for. I've built hundreds of wheels from my own measures and calculations, and that experience brings no clarity to your suggestion.
Still asking.
OK
I measure to get an ERD that INCLUDES the nipple, ie. to the top of the nipple.
(FWIW I never rely on published specs)
So most most calculators would generate a length that ends the spoke at the top of the nipple.
I offer the OPTION (IF you want.....) of biasing shy of the top, for single wall rims.
Step 3 is because some calculators I've used in the past assume the ERD is at the nipple seat, and a correction to bring the spokes out into the nipple. Since I already include the nipple, this would cause spokes to be over long by 3-4mm.
Note: while I didn't mention it there's already a small. <1mm. bias to the long side because of how spokes are measured.
Personally, I only think about it when rounding, and it's safely disregarded if working within 1mm of spot on.