Ski Bike

Step 5 Cut wood for ski mounts

Get yourself some wood that will fit between the dropouts of your bike (especially the front, which is generally narrower spacing) and be able to rotate freely without catching on anything. Standard 2x4 stud lumber worked for me here. Cut chunks to whatever length you deem appropriate, 6" worked for me. Cut enough so that you can stack 3 or 4 on top of each ski and then one more to bolt over the top of the axle.
NOTE: Axle height definitely affects the handling. I initially went with 3 stacked, but I think I'm going to up it to 4 pretty soon. My first bike's axle was at about 6" off the ground and it handled great. This one, at about 4.75", feels a little off, but not bad.
Sand the edges if you want, paint them if you want, etc...