Official BSA Pro Ultra Lite Pinewood Derby Speed Wheels and Axlesby DerbyWorx

MAXIMUM VELOCITY!^®

4060
Official BSA
Pro Ultra Lite Pinewood Derby Speed Wheels
1 Gram Wheels by DerbyWorx
&
4094
BSA Speed Axles

Now, the ultimate wheel for your BSA race!
Our Pro Ultra Lite Pinewood Derby Speed Wheels are official BSA wheels which are precision machined by DerbyWorx with a CNC (computerized) lathe to within 0.0005 inches for the ultimate in accuracy and thus, maximum performance. To provide you with an awesome set of wheels, DerbyWorx performs the following operations:

Wheel bores are reamed 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.
The weight of the wheel is reduced by removing all excess plastic from the underside of the wheel tread and the inside wheel face.

Benefits

Round and smooth wheels roll faster than standard wheels.
The weight reduction provides a faster start, and improves the balance of the wheel for a smoother ride.

Usage

The Pro Ultra Lite 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

Model	Trued 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 4060/4061 Wheels

Wheel Diameter: 1.170 ± 0.001 (Raw Wheels: 1.182 to 1.185)

Wheel Bore ID: 0.098

Wheel Weight: 1.0 grams +/- 0.1 per wheel (Raw Wheels: 2.7 grams/wheel)

Copyright © 2012 by Maximum Velocity, Inc.
Ž 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