A stabilizer arrangement (11) of an implement-carrying vehicle (12) such as a skid-steer loader, deployable to stabilize the vehicle during implement use, comprises an elongated, ground-engaging member (18) extending widthwise either side of the fore-and-aft axis of the vehicle at least when deployed, and is deployable between a stowing position and an operative, ground-engaging position by a ram arrangement (21) acting on the member (18) intermediate its ends.