WDULS – ULTRA-LITE Smooth Cut Speed Wheels

• Wheel	m (grams) aprox.*	I (g/cm2) aprox.*
  1999 BSA Stock	3.6	5.12
  2009 BSA Stock	2.6	3.66
  1999 ULS	1.88	1.88
  2009 ULS	1.55	1.75

  This represents a reduction in mass of up to 57.0% and a 65.8% reduction of rotational inertia.

IMPORTANT: Please consult your local racing rules as some of the methods and / or products may be not be allowed.

Although it’s very flattering..
BEWARE OF CHEAP (and expensive) IMITATIONS

Looks can be deceiving. These guys are made from Official BSA Pinewood Derby® Wheels that are mold matched then lathe turned round and concentric with reamed and polished hub bores. Just like the H62’s …with one major difference.

These wheels are turned from the inside to remove material from the inner tread surface. The average wheel weight of the WDULS is reduced to about 1.88 grams. This means it takes less energy to get the wheels rolling. Less mass reduces Rotational Inertia.

• DIA: 1.176″ (avg. – wheel sets match)*
• BORE DIA: .098″ – Reamed & Polished with SlickSilver™
• HUB: Face Polished with SlickSilver™
• WEIGHT: (see chart)**

due to wheel/mold characteristics,
values are approximate
* Wheel Diameter +/- 0.003″
** Min Wheel Weight
Max +0.1 gram +/-3%
This data is for comparison

*due to wheel/mold characteristics,
values are approximate (+/- 3%) .
This data is for comparison to illustrate the UL Advantage