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Official BSA
Pro-Stock Pinewood Derby
Matched Speed Wheels
&
BSA Speed Axles






4081
Official BSA
Pro Stock
Matched Speed Wheels (4) &
4094-Speed Axles (4 ea)

Special Price
In Stock
$29.95


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:

  • The wheels are sorted by mold number, and any defective wheels are discarded.

  • Wheel bores are reamed and bored perfectly round and smooth.

  • Outer hub faces are coned to minimize contact with the axle head.

  • The wheel tread is lathed with True Track to achieve a perfectly round wheel, a flat tread surface, and a slight radius on the edges to replicate the look of a stock BSA wheel.

If you would like to order wheels with a particular mold number, Click Here.

Benefits

  • Round and smooth wheels roll faster than standard wheels.

  • Matched mold numbers ensures that the bore diameter and other wheel measurements are identical, maximizing performance.

Usage

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

ModelTrued
Tread
Coned
Outer Hub1
Trimmed
Edge
Reamed
Bore
Weight
Reduced
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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We cannot guarantee that your pinewood derby car will win a trophy, but we can guarantee that you will be satisfied with our products. If you are not satisfied with a product, please refer to our Return Policy

 
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