Storm Equinox 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.

Ready to dominate league nights? The Storm Equinox is your next-level performance ball, made for serious bowlers who demand backend power and control.

Purpose-built for league and weekend warriors, the Equinox is tuned for medium to heavy oil patterns—especially those in the 39–44 ft range that dominate competitive play. It delivers that signature Storm backend motion with a blend of power and precision you can count on.

At the core is Storm’s all-new Solarion A.I. Core, an asymmetrical design featuring three strategically placed cylinders. The central mass lowers the RG (2.48) for a quick revving action, while the top cylinder improves drilling flexibility. The lightweight base increases torque and creates a strong continuation through the pins. A .054 differential and .018 mass bias add aggressive flare and high-powered motion.

On the surface, the A1S Pearl Reactive coverstock debuts Storm’s Adhesion System Technology, designed to grip the lane with advanced tackiness. Combined with the Power Edge Polish finish, it delivers easy length with a crisp, angular move at the breakpoint—ideal for those looking to open up the lane and finish strong.

Specs at a Glance:

• Coverstock: Storm A1S Pearl Reactive

• Core: Solarion AI Core (Asymmetrical)

• RG (15lb): 2.48

• Diff (15lb): 0.054

• Mass Bias: 0.018

• Finish: Storm Power Edge Polish

• Flare Potential: 4–5 Inches

• Best For: Medium to heavy oil patterns

• Weights: 12lb–16lb

• Color: Purple

• Scent: Blueberry Crumble

• Performance Level: High Performance (Storm Premier Line)

Whether you're chasing a league title or weekend bracket wins, the Equinox brings advanced core dynamics and elite cover tech to your arsenal.