Pinewood Derby Wheels 2013

Inner Bore Dimensions

There are 16 different molds in the NEW BSA Wheel set. Below is our data regarding this info. Measured with precision pin gauges with 0.0002″ accuracy. Our mathematical calculations are based upon our best attempts at measuring data. We measured 50 wheels of each mold (800× wheels) and compiled the data below. Wheels are coming along very well. Most molds are dead spots.

Best results are achieved using wheels with the smallest average deviation and smallest bore size. View Excel Spreadsheet

MODE: The most common value in a data set.

Typical measured diameter of all wheels (TMD): 0.0970

Our favorite wheels are the #9 and #11 molds.

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Machine Envy, LLC is neither affiliated with nor endorsed by the Boy Scouts of America. Pinewood Derby® is a registered trademark of Boy Scouts of America.

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Copyright © 2012-2021 Machine Envy, LLC.  All Rights Reserved.  Derby Dust® is a registered trademark of Machine Envy, LLC.

Machine Envy, LLC is neither affiliated with nor endorsed by the Boy Scouts of America. Pinewood Derby® is a registered trademark of Boy Scouts of America.

Derby Worx® is a registered trade mark of Derby Worx, Inc. Rail Rider™ is a registered trademark of Derby Worx, Inc.

Awana® is a Registered Trademark of Awana Clubs International. Machine Envy, LLC is neither affiliated with nor endorsed by the Awana Clubs International.