Here’s the wheelset I’m staring at: 35mm profile, 2:1 lacing pattern, 2-cross straight-pull spokes DS, radial straight-pull NDS. 11-speed compatible. Effective flange diameter and spacing is unknown. Composition of the rim is apparently an aluminum-carbon mix in a
tubular clincher cross-section. Also unknown is whether a clincher version will become available. A 24mm and 50mm deep profile is also offered. Weight is unknown. Spoke nipples are external for easy truing. This new road wheel series will be compatible with 8, 9, and 10 speed drive trains too. A lower-level, all-aluminum 30mm rim, the RS31, will be available as well. More info here.
I hope to learn more about this wheelset. It already has most, if not all, the design features I would want in my race-day only wheelset. Maybe now I won’t have to build it, I can just buy it. A LBS didn’t know about it yet nor could recommend a factory contact. Additionally, information is yet to be posted on Shimano’s website. …waiting, waiting, waiting.