ECX Wheel Hex Set (4): 1:10 4wd All Made by ECX Electrix ECX Electrix part number 232013; UPC 605482116753 This item works with: ECX 1:10 4WD Circuit Stadium, 1:10 4WD Ruckus Monster, 1:10 4WD Torment Short Course, 1:10 Circuit Stadium Truck, 1:10 Ruckus Monster Tuck