Originally Posted by
msl109
Hmm. Now that's interesting - by a +4.5mm margin for error, you mean when the spokes are too short?
Too short can kinda-sorta be compensated for by using longer nipples.
That concept is a bit intriguing.
DT sells 16 mm nipples, where you'd need to be really, really spot on to get the spoke fully into the flange of the nipple - with Little to no room for further trueing.
And DT doesn't post any disclaimers about the use of these nipples.
OTOH, it's quite well accepted by wheel builders only to use spokes that do reach fully into the flange portion of the nipples.
So either builders are overly cautious, or DT are a bit daring.
Take your pick.
Originally Posted by
msl109
I can't visualize how they would compensate for too long a spoke ..
That part is easy.
The threaded length in a (DT) spoke is something like 3-4 times longer than needed WRT strength(but it can make build easier). By leaving more of the nipple "empty" at the hub end, the nipple can thread on longer. And since overshoot is rarely a problem on double-wall rims, it makes for extra adjustability.