Graph of bowling ball RG (radius of gyration) and Differential of RG, plotted on orthogonal axes.
<p>Data from bowlingball.com educational page at<br></p>
<ul><li><a rel="nofollow" class="external free" href="https://www.bowlingball.com/wordpress/bowling-ball-rg-and-differential-range-ratings-2">https://www.bowlingball.com/wordpress/bowling-ball-rg-and-differential-range-ratings-2</a><br></li></ul><p>Archive:<br></p>
<ul><li><a rel="nofollow" class="external free" href="https://web.archive.org/web/20141226063716/https://www.bowlingball.com/wordpress/bowling-ball-rg-and-differential-range-ratings-2">https://web.archive.org/web/20141226063716/https://www.bowlingball.com/wordpress/bowling-ball-rg-and-differential-range-ratings-2</a></li></ul><p><br>
FYI: the following definitions are from:<br></p>
<dl><dd><a rel="nofollow" class="external free" href="https://www.bowl.com/uploadedFiles/Equipment_Specs/Information/Updated_Terminology.pdf">https://www.bowl.com/uploadedFiles/Equipment_Specs/Information/Updated_Terminology.pdf</a>:<br></dd></dl><p>Archive:<br></p>
<dl><dd><a rel="nofollow" class="external free" href="https://web.archive.org/web/20181008144702/https://www.bowl.com/uploadedFiles/Equipment_Specs/Information/Updated_Terminology.pdf">https://web.archive.org/web/20181008144702/https://www.bowl.com/uploadedFiles/Equipment_Specs/Information/Updated_Terminology.pdf</a></dd></dl><ul><li>Radius of gyration, RG - Measured in inches, radius of gyration 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.</li>
<li>Moment of Inertia - Resistance to change in rotation.</li>
<li>Total differential - The difference between the X (low RG) and Y (high RG) axes values of any bowling ball.</li>
<li>Intermediate differential - The difference in radius of gyration between the Y (high RG) and Z (intermediate RG) axes on the bowling ball.</li></ul>
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