The hub appears to match the “NineCont front” dimensions from the Grin calculator - the spoke circle diameter is 233 mm. As for the rim, 406 is actually the bead diameter; ERD is 394 mm according to this chart (PDF).NeilP wrote:Out of interest did you calculate accurate lengths from spoke angles for each different spoke length or just use 'generic' near enough figures.

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What 9C motor is it? what is the spoke hole circle diameter and spoke hole diameter.

I have the ERD of the rim as 406mm

From these numbers, for the first pattern I calculate these lengths and their corresponding angles from normal to the rim:

80.6 1.8

81.1 5.4

83.8 12.2

For the second pattern, there’s a 4th spoke length and angle for the “V” spokes:

82.2 8.9

I ordered 82 for the two shorter lengths and 85 for the two longer lengths.

Your idea of crossing the most parallel spokes in these patterns looks good - basically it changes the shortest length and angle to the longest. (80.6 mm, 1.8 deg -> 83.8 mm, 12.2 deg)

I was avoiding something like this because of the offset spoke holes, but the offset looks minimal so it’s probably not an issue: