Official BSA
Pro-Stock Pinewood Derby Matched Speed Wheels
2.5 Gram Wheels By DerbyWorx
4094 - BSA Speed Axles

BSA pinewood derby wheels are well designed, but unfortunately the wheels vary considerably from mold to mold. Most of the wheels are not perfectly round and the tread surface is not even.

These Pro-Stock Pinewood Derby Speed Wheels are official BSA wheels which are sorted by mold number, and then precision machined with a CNC (computerized) lathe for maximum performance. To provide you with an awesome set of wheels, we perform the following operations:


These Pro-Stock Matched Speed Wheels can be used without any additional preparation. Optionally polish the wheel bore, then lubricate and race!

Important Note

The lathing operation removes a small amount of tread surface. The serrated edge is intact. The tread reduction is barely visible to the eye, but is measurable with a caliper. If your race restricts the use of lathed wheels, consider using our specialty tools and supplies to prepare a set of raw wheels.

Comparison Chart and Photos of Matched Speed Wheel Types

Outer Hub1
4090/4091 Yes No No No No
4080/4081 Yes Yes Yes Yes No
4070/4071 Yes Yes Yes Yes Yes
4060/4061 Yes Yes Yes Yes Yes
1The inside wheel hub is coned by default on BSA wheels.

Technical Information for 4080/4081 Wheels
Wheel Diameter:   1.170 ± 0.001   (Raw Wheels:   1.182 to 1.185)

Wheel Bore ID:   0.098 minimum

Wheel Weight:   2.5 grams per wheel   (Raw Wheels:   2.7 grams/wheel)

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