MAXIMUM VELOCITY! ®
Ultralight Pinewood Derby
Matched Speed Wheels
1.6 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
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 squared 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 inner edge is polished to reduce friction when rail-riding.
The weight of the wheel is reduced by removing plastic from the underside of the wheel tread.
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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.
The weight reduction provides a faster start, and improves the balance of the wheel for a smoother ride.
The Ultralight Matched Speed Wheels are used without any additional preparation. Optionally polish the bore with Bore Polish, then lubricate and race!
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.
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: 1.6 grams per wheel (Raw Wheels: 2.7 grams/wheel)
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