Roto Grip Attention Star PRE-DRILLED Bowling Ball

This ball ships professionally PRE-DRILLED for your convenience.

We’ve simplified the process so you can hit the lanes faster. Based on the ball weight you choose, we’ll drill it to a standard hand size that fits most bowlers in that weight range:

• X-Small (6lbs): Ages 8 & under
• Small (8–9lbs): Ages 8–11, women’s ring size 8–11
• Medium (10–12lbs): Ages 11–15, adult ring size 10 or under
• Large (13–14lbs): Men’s ring size 10–12 or larger hands
• X-Large (15–16lbs): Men’s ring size 13+ or extra-large hands

Want a different drilling size than standard?
Email us immediately after checkout with your order number and your preferred size.

Roto Grip Attention Star Bowling Ball

Step aside ordinary—the Roto Grip Attention Star Bowling Ball brings a whole new level of innovation to the lanes. Featuring the long-awaited U.S. release of the Momentous™ AV Core, now enhanced with A.I. Core Technology, this asymmetrical powerhouse creates never-before-seen motion that blends clean length with explosive backend energy. It’s not just a ball—it’s a statement.

Wrapped in the trusted eTrax™ PLUS Pearl Reactive coverstock (as seen on the RST X-2), the Attention Star delivers exceptional responsiveness to friction, making it ideal for medium to heavy oil conditions. Polished with Storm’s Reacta Gloss finish, this ball clears the heads with ease before unleashing a sharp, defined move on the backend.

The Momentous A.I. Core—previously reserved for international markets—has been recalibrated with advanced density changes to maximize energy transfer through the pins. Combined with a 2.48 RG, .049 differential, and .017 mass bias strength, this high-performance ball delivers angularity, continuation, and a strong mid-lane read unlike anything else in the Roto Grip lineup.

Technical Specifications:

• Brand: Roto Grip

• Coverstock Type: Pearl Reactive

• Coverstock Name: eTrax Plus Pearl Reactive

• Core Shape: Asymmetrical Core

• Core Name: Momentous A.I. Core

• RG (15LB): 2.48

• Differential (15LB): .049

• Mass Bias Strength: .017

• Flare Potential: 4 – 5 Inches

• Surface Finish: Storm Reacta Gloss

• Lane Conditions: Medium – Heavy Oil

• Performance Level: HP4 (High Performance)

• Color: Black, Grey, Purple

• Available Weights: 12LB – 16LB

This is the ball for those who dare to go beyond the norm—powerful, angular, and precision-engineered to dominate the backend.