Most BMX 20" ERD's are in the 392 - 396 range.
Most 48 Hole High Flange Hubs are in the 58-62mm range.
Most 48 Hole High Flange Hub Offsets are in the 31.00 to 34.5mm range.
For two cross your spoke lengths would be in the 172.00mm to 176.00mm range.
Dude...you are probably doing EVERYTHING wrong!!!
=8-)
https://www.mrrabbit.net/wheelsbyfle...plications.php
Grab the spreadsheet a little ways down...
=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life