https://amclassic.com/index.php/downloads/dl/file/id/24/product/0/spoke_lengths_road.pdf
Track 420: Front 18H Bladed Spokes 258 Rear 24H Bladed Spokes 272 Spoke lengths are calculated using American Classic nipples. If you are using any nipple other than an American Classic nipple, you MUST subtract 2mm from the length listed below.
also: https://amclassic.com/index.php/downloads/dl/file/id/23/product/0/wheel_tension_and_truing_specifications.pdf
The special nipples could be these: Sapim makes similar ones: Sapim Polyax Brass Nipple 2 mm - Double Square https://www.bike24.com/p2200457.html or aluminium: https://www.bike24.com/p2200473.html
Amazing info!! Thank you!
@ChainBreaker started
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https://amclassic.com/index.php/downloads/dl/file/id/24/product/0/spoke_lengths_road.pdf
also:
https://amclassic.com/index.php/downloads/dl/file/id/23/product/0/wheel_tension_and_truing_specifications.pdf
The special nipples could be these:
Sapim makes similar ones:
Sapim Polyax Brass Nipple 2 mm - Double Square
https://www.bike24.com/p2200457.html
or aluminium: https://www.bike24.com/p2200473.html