Originally Posted by
dabac
There is some room for judgement/preference/fudging WRT spoke length, so it depends on where your current spokes ends in the nipples.
If your current build is kinda long, then 2 mm shorter can be OK.
If your current build is mid-range, then 2 mm short will leave a questionable build.
If your current build is kinda short, then 2 mm short will leave an outright poor build.
Unless you tinker around with longer nipples, a method usually frowned upon.
With spokes ending at the slot of alloy nipples, more than 2mm additional ERD is likely to break nipples.