The Advantage of Mold Matched Pinewood Derby Wheels may help you get that final push to the finish line.
What exactly is the real advantage of having Mold Matched Pinewood Derby wheels?
Pinewood Derby wheels are made of plastic. Each wheel has a mold number on the inside. The mold numbers range from 1-15. Each individual mold number has a unique inner bore diameter. If you have all 4 matching wheel molds, you will also have matching inner bore diameters. If each wheel has a different inner bore diameter, this may affect overall performance and be harder to tune, especially on a tuning board.