Rim: Cerchio Ghisallo, 'Brompton' model, 28º.
Tyre: Panaracer Rapide 16" tubular, 18mm width (typically sold as racing wheelchair component).
The fastest tire in ETRTO 349 (and also ETRTO 406) is the Scorcher 120.
Scuttlebutt from the recumbent world is the TruBlu ISO40x349, 120tpi is faster. No personal knowledge one way or the other.