A X-Comp bowling ball from SPI Bowling Products (Storm, Roto Grip, and 900 Global) will have an X stamped by the serial number. X-Comps generally have a cosmetic blemish. The Pin (Core Top) distance is in the 2-4" only range and Top Weight 2-4oz. range. The reaction of the bowling ball will be the same as the first-quality ball.
Unleash your inner rockstar and relive those epic moments of shredding on air guitar or pounding on air drums in front of your imaginary sold-out crowd. We’ve designed an instrument to let you channel that same energy—this time, on the lanes.
To elevate the HP3 line, we called on our R&D team to craft a new blend of core and cover, and they delivered big time. The all-new Rocker Core introduces a unique and dynamic motion down the lane, while the innovative NanoStar coverstock offers a bold yet timeless grip, delivering peak performance on medium to heavy oil conditions.
Here's what Roto Grip has to say about the Rockstar:
We both know that at some point in your life you ripped on an air guitar or shredded on the air drums to the roar of a sold out crowd in your own head. So we decided to help you release that inner ROCKSTAR of yours by creating an instrument everyone can use to make noise on the lanes.
In order to kick things up a notch in the HP3 line we requested a new combination of core and cover, and well, lets just say the R&D Band did not disappoint. The new Rocker Core brings an alternative motion throughout the lane. While the new NanoStar coverstock provides aggressive yet classic traction throughout the lane on those Medium to Heavy conditions.
