Paragraph First ImpressionsThe Rock Star is smooooooth. Tamer Elbaga (Lefty)Style: TweenerRPM: 330 rpmPAP: 5 & 3/8 upAverage Speed: 18.5 mph (at release)Axis tilt: lowAxis rotation: medium/highTest Equipment: 14 PoundsLayout: 4 x 40 Bryan Hoffman (Righty)Style: StrokerRPM: 280 rpmPAP: 4 1/2 & 1 1/2 upAverage Speed: 18.5 mph (at release)Axis tilt: highAxis rotation: mediumTest Equipment: 14 … Continue reading Roto Grip Rock Star Bowling Ball Review →