There's no need for the trial and error that has been suggested so far. There are clearly published specs:
Here they are:
A = Freewheel Stop to End-of-Locknut
B = Drive-Side-Flange-Center to End-of-Locknut
C = Outside-of-Locknut to Outside-of-Locknut
Regular 5 and 6 Speed
A = 29.00mm for 5 Speed
A = 35.00mm for 6 Speed
C = 120.00mm-122.00mm
Narrow 6 Speed, 7 Speed and 8 Speed
A = 31.00mm for Narrow 6 Speed
A = 36.00mm for Narrow 7 Speed
C = 125.00mm to 127.00mm
A = 40.50mm for Narrow 8 Speed
C = 130.00mm or 135.00mm
Sources:
Sutherland's 5th Edition, Page 10-5
Sutherland's 6th Edition, Page 10-6
=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