A wheel skid having an arcuate base for facilitating mobility of a vehicle on terrain where wheels ordinarily sink into the terrain, and/or otherwise become directed in a direction other than the desired direction of travel of such vehicles, and where wheeled transportation is otherwise difficult or impossible, and hazardous. The wheel skid has an arcuate base having a slot, a wheel assembly having a wheel, the slot having the wheel of the wheel assembly protruding therethrough, and a fastener fastening the wheel assembly thereto the wheel skid. The wheel skid may be supplied as a complete unit and/or as an accessory skid for retrofit installations.