4 wheels per set.
Axles not included.

16 different molds are used to make BSA wheels. Wheel characteristics vary
from one mold to the other. Mismatched wheels may not work well with each other.
All of our prepared wheels are matched to the same mold.

These wheels are:

• Step is removed from outer hub and the hub is domed to reduce friction. Domed outer hub means that we remove the lip on the outer hub then taper the hub so that the head of the axle rides only on a small area surrounding the wheel bore reducing friction.
• All four wheels are from the same mold to match characteristics and improve performance.

This wheel should be legal in races that specify any of the following:

• Wheels must be the original shape as packaged in the Official Cub Scout Grand Prix Pinewood Derby Kit. (Wheels must not be peaked, ‘H’ed, humped, tapered, or narrowed.
• The only work allowable to any wheel is to remove manufacturing defects such as burrs or injection flanges.
• Wheel treads must not be tapered, narrowed, rounded or grooved. Wheel treads must remain flat.
• Wheels are not to be turned on a lathe, completely smoothed or modified. Some of the original surface must still be visible.
• Wheels may not be tapered or rounded. The wheels may be slightly sanded to remove any mold marks but may not be modified in any other way.
• Only the Official Scout Grand Prix wheels may be used. Wheels may be sanded (smoothed to remove knit/mold lines) but the wheel’s profile may not be altered.

And similar rules.

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