Yeah, they are 23.8 all the way around. Same with the Nitto 002.
Now my nitto road bars are taped, but the 24.0mm clamp fits perfect wherever there is no tape.
I also have some generic drops that came with the bike. They aren't taped. The middle section is 25.4mm for the stem, then tapers down to 24.0mm for clamp, then right before the bar starts to curve it goes to 23.8mm.
Anyways, I just used the regular oury's. A drop of water helped me slide them on, and let them dry for a day and they seem pretty right on there. Used a homemade shim for the brake clamp. I would guess the slightly larger diameter on this bar, 23.8 vs 22.2 would make the oury's stay put better. I won't know until I get caught in the rain someday.
Was just hoping there would be a way to get the lock in to work with this bar, but doesn't seem possible.