Most wheel sets are built with 1mm spoke difference between front, rear drive, and rear non-drive side. Sometimes 2mm. For instance the front might take 290mm spokes, and the rear will take 290 and either 291 or 292. I would imagine that the spokes included are rear drive side, because that is where they are most likely to break. But even if you must use a 290 spoke where a 292 would be proper, even in bear and lion country, it would still work just fine.

I would love the way the disc trucker rides and brakes, but damn, I hate how finicky disc brakes are. This bike does look really nice though.