Aerodynamic Wheel Disks - For your Bike

Step 4 Fit and Duplicate

You'll likely find that your disk doesn't fit. OR, it rubs against the tire. Now is the time to break out the sander and start filing the edge down. It's helpful o mark where the disk contact tire, and then start sanding. This process will take some time - but your efforts will be worth it in the end.

To duplicate -- lay out the cut plastic flat on top of an uncut sheet of plastic. Trace the edge, cut, wedge and fit just like the first one.