Rock rails are protective bars or plates attached to the sides of a vehicle, like a truck or SUV, that shield the vehicle's underside from damage when driving over rough terrains or obstacles, such as rocks or logs. Full definition
Off - road tires sit at the corners, and rock rails protect the sides. (autoweek.com)
Custom tailored rock rails, side steps, and flood lights will help to deal with those rocky roads and hot desert nights. (bestride.com)
The Rubicon is lifted and includes black fenders, an upgraded power hood, and off - roading rock rails with tread plates. (WWW.BravoCDJRofAlhambra.com)