Rov Mk3 drive base, 12X12" 4-wheel drive, 3.5" RCW plastic wheels, 100watt gear-motor: 12v 500rpm x4. NOTE: This is a "work in progress", its a rough prototype, parts are custom and hand built. Cone is big and local pick up is preferred, i'll run you thru the basics of cone care and use.
eBay