I've read a few things about people suggesting that a 24" wheel/tire conversion is a possible path to increased tire availability, specifically for winter/studded tires. My Radwagon arrives next week and I'm pretty committed to figuring something out that will allow me to ride all winter. From what I've been able to gather, going from a 22x3 tire to a 24x1.9 will result in nearly identical overall diameters. There seems to be good tire availability in 24x1.75, which is slightly smaller overall.
Most 24" rims seem to be intended for BMX use. My LBS mechanic suggested these as a good/strong option, but I'm concerned about the overall weight of the RW4, me and two kids.

Does anyone know of a 24" 36 hole rim intended for cargo/e-bike use? Has anyone actually done this yet with good results? I'm determined to find a way to ride the RW4 year round!