Axles Speed Performance Simulator

Select Axles and see how they affect performance

Car Designer with Speed Simulator

This cool pinewood derby Car Designer with Speed Simulator* is another Pinewood Pro exclusive. Select car parts and watch the little race car move toward the finish line.

Your Car's Speed Rating


  • Click any Axles to add them to your Shopping List and watch your car move to the checkered flag.
  • Read Performance Rating and watch the car at the top to see how that product affects your car's speed.
  • Click Remove Axles to remove them.

  • What are the Performance Ratings?
    A fun tool that simulates the performance of our products. To see actual track-tested speed ratings, see our Speed Tests.

    What is your Shopping List?
    Your Shopping List (upper left column) conveniently tracks the products you selected. It is NOT your Shopping Cart. To purchase the items, click on the product in your Shopping List to go to the product page where you can read about the product, then click Add to Cart on that page.

    Axles have been removed. You can select a new set of axles, or continue on to the wheels!


    Performance Rating

    Axles are important to making a fast car because friction between the wheels and the axles will slow down your car! Our axles make your car faster with options such as a groove to reduce friction, graphite coating, and axles polished to perfection.


    How Axles Make All the Difference

    To build the fastest car, you need to minimize friction. Friction between the axles and the wheels is the biggest factor in slowing down your cars. With this tool, you can customize axles and wheels to create your own car with as little friction as possible. Less friction = More speed, and speed is what wins races.

    Axle Tips and Speed Hints

    When your wheel rubs against the axle head it can cause the wheel to wobble because the corner of the axle head is not a perfect 90 degrees. Cutting a groove directly under the axle head removes this source of wheel wobble, but it is difficult to do by hand. Consider our Grooved Speed Axles that have a groove cut directly under the axle head.

    The stock BSA "nails" that come in your kit are mass produced. These nails have burrs, crimp marks and can also be crooked, all of which severely limits your car speed. An Axle Polishing Kit and Axle File are essential to fix your axles and increase your car speed.

    The axle slots that are cut into standard blocks are too tight for your .089" diameter axles. Small axle slots make it difficult to get your axles in straight. A #44 drill bit is .086", which I find too tight. Consider a #43 Drill Bit, which is a perfect match at .089" for a snug fit.

    Using the Pinewood Derby Car Designer

    Select your Axles and watch the little car advance toward the checkered flag.

    • Choose axles based on performance and your race rules.
    • PRO Axles have our exclusive graphite-coating giving you the highest performance

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    • Your Shopping List