Disc front wheels are often dished, too, which means the RH spokes will see very high tensions under braking. They won't actually snap the first time you use the brakes but they'll see a lot of tension variation in use. This wheel needs to be very well built, using top quality spokes and with the spoke line corrected so there is no possibility of flexing at the elbow or where the spoke enters the nipple.
"Disc front wheels are often dished, too, which means the RH spokes will see very high tensions under braking."
If the disc front wheels are dished, won't the LH spokes be at a higher tension than the RH spokes? Why will the RH spokes see "very high" (presumably you mean much higher than when the brake is not being applied) "tensions under braking". If the tensions in the static wheel are (say) 1000N on the RHS and 1200N on the (dished) LHS, how much higher are these "tensions under braking"?
"They won't actually snap the first time you use the brakes" - No, really? What do you mean by "actually snap" btw?
"but they'll see a lot of tension variation in use." - how much is "a lot"? Is it significant compared to the variation which happens every time the wheel rolls round and the lower spokes drop to maybe 75% of static tension? And will this spoke tension variation caused by braking have any material effect on the number of tension/less tension cycles which would cause spoke failure by (metal) fatigue?
"This wheel needs to be very well built" - ideally all cycle wheels need to be well built, surely.
". . . with the spoke line corrected so there is no possibility of flexing at the elbow or where the spoke enters the nipple" - Please could you explain how one chooses components (hub, rim and spokes) which allow the "spoke line [to be] corrected" or how one does this in (wheel building) practice?
I think
@bladderhead has pointed out that 32 is sensibly better than 24 when it comes to spoke number in a disc braked front wheel. But the quality of build is probably more important.
