I ran these tires last season, worked great:
https://www.intheholegolf.com/TIR-20X4STUD-RAD/Rad-Power-eBike-Studded-Tire---20%22x4.0%22-Studded-Fat-eBike-Tire.html
Great traction and very durable.
https://www.intheholegolf.com/TIR-20X4STUD-RAD/Rad-Power-eBike-Studded-Tire---20%22x4.0%22-Studded-Fat-eBike-Tire.html
Great traction and very durable.