The DT Swiss 340 hubs are a slightly heavier, less-finished version of the awesome 240. The freehub body and ratchet rings are the same as the 240 – the best feature of these hubsets. The DT 370 on the other hand uses a heavier, less robust standard pawl mechanism.
I rebuilt these used hubs onto a pair of Crest 29er rims. On the front wheel I used DT Swiss Competition spokes on the disk side and the lighter Revolution spokes on the non-disk. Both sides use aluminium nipples.
On the rear wheel I used the stiffer Competitions and heavier brass nipples on the driveside and lighter Revolutions and aluminium nipples on the non-driveside.