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Shit, I though I commented here earlier but it didn't show up.
Are you sure ERD is 544mm? I built a 27.5 KOM and ERD was 560-something. It was i19 or i21 though.
frankenbike-
I built a 27.5 KOM and ERD was 560-something
Good point well made. WTB KOM ERD chart:
gbj_tester
I'm new to this, but want to try lacing up a wheel. Will take it to a shop to tension/make into an actual wheel.
The plan is:
Sturmey Archer HBT30-R (130mm fixed so no dishing)
WTB KOM i25 27.5
3x
I've thrown everything into this calculator:
https://bikeschool.com/resources/spoke-calculator
and it came out with 262.5mm spokes.
based on:
effective rim diameter - 544mm
Pitch Circle Diameter/flange diameter - 61.5mm
hub centre to flange centre - 33.3mm
spokes - 32
pattern - 3x
Have I missed anything? Does this look okay? I'd round up the spoke size to 263mm wouldn't I?
And otherwise just need nipples and I can start lacing up?
Thanks very much for your help!