I frequently carry skis on my bike (GSA) during the late spring or early summer. I have a PVC tube anchored to my pannier. The tube accommodates the width of the skis (current model about 123cm at the tips) and the bindings rest at the top of the tube preventing them from dropping too low. I'll also secure the poles with the straps over the ski tips and "bungy" them as well at the lower end. Carried vertically, if not obvious from the description. I enjoy both activities and when possible it is great fun to have both together.