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Spoke length calculation for someone on Reddit

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BikeGremlin

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Yes, I do spend my time and effort for stuff like this - LOL.
And yes, I'm too old to figure out how to post a PDF on Reddit. :)

So, here are my calculations for these hub dimensions on Reddit, based on presumptions I posted in this Reddit comment - see the attached PDFs for details.

Briefly put, based on these calculations (PDF are shared publicly so that I can be easily corrected):

Front hub:
Even lengths: 196 mm (left); 198 mm (right)
Odd lengths: 195 mm (left); 197 mm (right)

Rear hub:
Even lengths: 198 mm (left); 196 mm (right)
Odd lengths: 197 mm (left); 195 mm (right)

That is for 2mm thick spokes, 12 mm long (brass) nipples, and assuming the ERD is measured correctly - laced 3 across, with 32 spokes.

Re-posting the given dimensions.
Note that the "spoke hole diameter" in the pic probably refers to the rim, not the hub.
Also, note that the hub flanges are 3 mm thick, so I added half of that (1.5 mm) when "measuring" the flange offset from the hub's lateral centre line.

The given hub and rim dimensions for the calculation
 

Attachments

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