Roto-Grip "Pro CG" Technology
PRO-CG: A Pro-CG is where the CG ends up a certain distance left or right of the Pin and PSA (preferred spin axis). If you draw a line from the PIN to the PSA on average the CG would need to be 2" or more from that line. That distance will vary depending on if the CG was to the right or left. Although still categorized as a first quality ball it has limited drill options (see our Pro-CG Drilling Options) that requires a certain type of layout. Please consult your pro shop professional before purchasing one of these balls.
How or why is a Pro-CG manufactured? A pro-cg is created during the manufacturing process. When the pin area is being drilled the core can slightly shift. When the weight block shifts just a small amount (1/16" - 1/32") it pulls the CG off the Y axis towards the Z axis. This is why on some balls you will notice the CG is a far distance away from the Pin to PSA line. These small shifts do not affect the reaction or quality of the product, but it can limit the drilling options. Therefore we offer a different set of drilling instructions and mark them as Pro CG's.
How much does the CG matter? The CG is the least of your worries when trying to match up a bowling ball to a bowler for their desired reaction. To learn more about how the CG's relevance and other factors when determining ball reaction, see our chart below provided by the U.S.B.C. Please also visit www.bowl.com and read some of their more recent articles on ball motion studies. (The U.S.B.C. is an independent organization with a common goal to protect the sport of bowling). This ball is sanctioned for use during USBC competition.
Dominate Short Oil with the Storm Domination NANO Short Oil Pro CG!
While we are always looking at the intended ball motion and desired reaction as the most critical part of the design process, we additionally focused on performance longevity while developing this new release. While nanotechnology creates several micro-peaks, these edges break off through normal wear, and during this process additional peaks are exposed giving you a strong, consistent ball motion that is built to last!
As for the Short Oil ball, we minimized the surface profile, reducing the surface roughness Ra numbers to single digits. And when polished to 1500-grit, this ball gave us the ability to control drier backends.
In addition to creating a smoother cover, we recommend placing the mass bias closer to your PAP to help you further dominate the short oil patterns.