Abstract: A ski attachment for operatively mounting onto one wheel of a wheeled vehicle, typically an unpowered wheeled vehicle such as a baby carriage or wagon, is disclosed. The wheel has an annular tire portion and a thinner centrally disposed hub portion. The ski attachment comprises a generally planar, elongated runner portion and upturned front and rear portions. A single attachment member has first and second co-operating arm members mounted on said base portion and extending upwardly from the ski member with first and second opposed gripping members mounted on the first and second arm members, respectively. The first and second gripping members are shaped and dimensioned so as to engage the hub portion of the wheel. A spring member is used to bias the first and second arm members into closing engagement so as to provide a gripping force therebetween.