Originally Posted by
velo-orange
Are you planning to re-use the old spokes with a new hub? That is generally ill advised- spokes are under constant loading and unloading cycles and can wear out. If you are building a wheel with a new hub, it makes sense to use new spokes. and a new rim for that matter.
Jobst Brandt says it's perfectly fine to re-use old spokes of they are in good shape, and points out a wheelset that has seen some incredible number of miles (100,000 ?) with many rim changes, using original spokes and NR hubs. Of course, most old wheelsets I find have rusty spokes and perfectly usable rims, as it seems few old bikes get enough miles to even wear through one pair of rims.