I am attempting to build up a rear wheel with the following (I have very little experience of wheel building BTW):
Dura-Ace FH7700 freehub
Gipiemme Parade rim
both are 16 hole!
no wheel builder or spoke supplier I have spoken to has this rim on their spoke calculator database, not even a guy with the proper DT Swiss calculator. All I know is that previously, when fitted with the original Gipiemme own brand hub, the wheel used 279mm spokes (I still have 14 of these left), and that the holes directly opposite each other on each side of the each flange are 5mm nearer on the Dura hub than the Gipiemme... basic logic tells me therefore to use a 2.5mm shorter spoke... although this gives me a size that DT don't offer in an Aero spokes (I forgot to say the spokes ideally need to be aero to match my front wheel)
for the time being I have bought a 6 pack of the 288mm DT Swiss Aero spokes to experiment with... but any advice would be greatly appreciated!