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