Translations:AY Honors/Pinewood Derby - Advanced/Answer Key/56/en

Wheel shaking occurs when the mold mark on the wheel's tread comes into contact with the track. This will happen once per rotation and will cause the wheel to jump into the air (even if ever so slightly). This energy would be put to better use powering your car toward the finish line. To address this issue, place the wheel into the chuck of an electric drill and rotate it against a piece of sandpaper you have mounted on a flat surface. Sand the tread down until it is smooth.