I'll chime in here because I saw quite a few of these when I lived in Switzerland. The runners you have look mighty thin and that box looks quite substantial. I would recccomend that you consider wider runners and watch what you make them out of as metal will have a tendency to collect snow and ice and actually drag on snow. Now - a lot depends on the constancy of the snow and the best way to get arround this is to find a way to put on wooden runners that can be waxed. Don't use that canning wax ; use the stuff they put on snowboards or skis. I think you have a great idea here - but widen them runners and make them out of wood. Use discarded skis for runners......Jlane35 said:For stability? Or for following in the tracks of the snowmobile? It's 3 foot wide now.
Or do you mean the actual width of the runner itself?