I took the hubs off the wheels and split them I cut the hub in half with the spindle out and mounted it in a tube and put the spindle back in to hold it together.
Then i made this triangle shape to hold the blades (ski) and just put it back on the bike.
Step 1: Splitting the wheels
Then take the spindles out and bearings and keep them in a jar or something these will need to go back in.
cut the hub in half so you can insert a steel tube between them then you can weld to the steel tube
Step 2: Making the triangle
These must be welded together into a triangle with a small bit of tube at the top for the hub Togo in.
The blades or skis are bolted to the bottom part of the triangle then the split hub, spindle and bearings fitted to hold it all together.
Make 2 of these one to replace each wheel.