Originally Posted by
saddlesores
i suppose i could try to measure, but seems a bit complicated trying to
measure correctly to the inside behind the wall of a double wall rim.
safer to find mfg specs online, or contact directly.
i made a misteak once, don't want to do that again!
Technically the spoke should be sized to more or less penetrate past the rim, nipple washer (if any), and through the head of the nipple.
You can measure your own ERD by taking two spokes (and nipple washers if you want. Add nipples and tie them together with a rubber band across the rim. Measure nipple to nipple, then add the length of the two nipples.