MAXIMUM VELOCITY! ®

4070
Official BSA
Ultralight Pinewood Derby
Matched Speed Wheels

1.8 Gram Wheels By DerbyWorx






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.

Our Ultralight 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:

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

Benefits

Usage

The Ultralight Matched Speed Wheels are used without any additional preparation. Optionally polish the bore with Bore Polish, 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 4070/4071 Wheels
Wheel Diameter:   1.170 ± 0.001   (Raw Wheels:   1.182 to 1.185)

Wheel Bore ID:   0.098 minimum

Wheel Weight:   1.8 grams per wheel   (Raw Wheels:   2.7 grams/wheel)



Copyright © 2016 by Maximum Velocity, Inc.
Maximum Velocity! is a registered trademark of Maximum Velocity, Inc.
Awana is a registered trademark of Awana Clubs International
Pinewood Derby is a registered trademark of Boy Scouts of America
PineCar is a registered trademark of PineCar