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Asymmetric Bowling Balls
Let's examine asymmetric bowling balls:
Asymmetrical Core (undrilled) - A ball where the RG (radius of gyration) values of the Y (high RG) and Z (intermediate RG) axes of the ball differ by more than 5% of the total differential of the ball.
Asymmetrical drilled balls show a defined, angular motion. These balls can create more area at the break point and will respond to friction faster at the break point than symmetrical balls.
It has been proven through United States Bowling Association (USBC) field studies that all drilled bowling balls are asymmetrical, whether they are symmetrical or asymmetrical before drilling.
The term differential in a bowling ball can be defined as the difference between the maximum and minimum Radius of Gyration. Radius of gyration, RG, is measured in inches and is the distance from the axis of rotation at which the total mass of a body might be concentrated without changing its moment of inertia.
The differential of RG measurement indicates the bowling ball's track flare potential. The higher the number the greater the track flare potential.
A key to ball motion is intermediate differential which is the measure of a bowling ballâ€™s degree of asymmetry. The larger the differential ratio, the more asymmetrical the bowling ball. Conversely, the smaller the differential ratio, the less asymmetrical the ball.
Examples of asymmetric bowling equipment can be viewed by clicking on the bowling ball links below:
DV8 Hell Raiser Revenge
Roto Grip Mutant Cell Pearl
Brunswick Nexxus f(P+R)
Hammer Taboo Jet Black
900 Global Black Eagle
If you wish to view some of the latest asymmetric ball equipment rolling down our test facility lanes, please check out our ball review videos at our site.
We also recommend you consult your local pro shop professional or our "Drilling Layouts" feature on our home page before choosing your next bowling ball so you may evaluate the important drilling layout options to help you achieve a desired ball motion.
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