I put a set of the 30TPI wire bead Supercell on my 2018 RadRover before I even rode the bike for the first time. There's also a folding 120TPI version. Got caught in the rain during my first ride to work and they handled great. Super quiet too. The only supplier I could find was BicycleBuys.com. They sell them directly from their website or as a 3rd party on Amazon. The tires and shipping are cheaper from the BicycleBuys website and they shipped it out the next day. I expected them to come completely unfolded as I've experienced with other wire bead tires. No worries though as I easily rubbed out some of the sidewall wrinkles and leaned them up against the wall for a day before mounting. By the way, mounting was a breeze. No tire levers needed except maybe to get your old tires off. PSI range is 10-20 for the wire bead. I keep mine at 18 for commuting on asphalt roadways. I also lockout my suspension fork. Here's a pic of the front tire on my RadRover.
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You can also look at the
Sandstorm by Chaoyang Tire. They're either making the Supercell for Origin8 or the Sandstorm is a copy because the tread pattern looks identical. No luck finding a US dealer for them though.