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2mm for nipple head + 0.7mm for washer + rim data .
round the final result up or down to even number (mostly down)
or measure REAL ERD with 2 spokes and 2 nipples and 2 washers
svenhöek-
Oh alright, I thought 1mm would about cover it. To be clear, this is 2mm per side, so +4mm when calculating the ERD, right? I'm using Light Bicycle rims, they say 510mm ("not including nipple head dimension", which matches what some other people have said), +4mm for the nipples then, +1.4mm for the washers = 515.4mm ERD.
In that case the DT Swiss calculators gives me 227mm ("226mm recommended") and 244mm ("243mm recommended"), when using the Standard brass 14mm nipples.
SwissChap
That's the measurement I meant. The 3.5mm thickness of the carbon rim itself is of course already included. The .7mm from the washers is why I'm thinking I should definitely be rounding up from that half millimetre. (makes sense here, no? @svenhöek )
Do you know what exact value I should take for the nipple base if I'm using Sapim Polyax, or the same measurement for DT Swiss Standard nipples?
Oh great, so he's legit then I assume. Because so far that's the best price I could find within the UK at least.