To create this very special PRO-Motion, Jason teamed up Storm’s Research and Development department to create a weight block design that is unique and benefits bowlers of all styles. It is a dynamic symmetrical piece that has some very unique characteristics. For bowlers looking to roll their best scores, the PRO-Motion gives total performance from foul line to head pin with a ball motion akin to the pros'.

Now Available

Color: Steel Blue
Fragrance: Vanilla Snap

Technical Specifications

  • 12 lbs.
    Radius of Gyration




  • 13 lbs.
    Radius of Gyration




  • 14 lbs.
    Radius of Gyration




  • 15 lbs.
    Radius of Gyration




  • 16 lbs.
    Radius of Gyration




The engine of change

The Piston core brings with it months of testing and validation in conjunction with the best player of our time: Jason Belmonte. Developed specifically for his line, the Piston Core creates separate helical archs that make the shape corkscrew as it tumbles. You can see the channels on the sides of the Piston Core and the large band through the equator which displaces the mass in a very specific way.


SPEC stands for “Storm Performance Enhanced Coverstock”. The intent behind this formula was to create something that withstands the rigors every bowling ball endures each time it takes a trip down the lane; namely, the friction and oil it encounters. We all know and accept that bowling balls smooth out over time, just like the tread on the tires of your car. With SPEC, you can expect consistent performance that is as tireless as it is dynamic. It’s bold, definite, and extremely potent.

Ball Reaction Section


Click and drag to control ball reaction



Click and drag to control ball reaction



Click and drag to control ball reaction


Product Reviews
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John Struckman
September 24, 2019
Storm Pro Motion Review - John Struckman
Excited for this ball would be an understatement. This bowling ball is in Storm’s Signature line developed by Storm’s Research and Development Department Hank Boomershine and Storm’s Professional Bowler… the #1 Bowler in the World Jason Belmonte. Combining the thoughts of Storms R&D team and Jason Belmonte produces a ball with a unique shape, one that is smooth and controls the break point. At 15lbs the bowling ball has an RG: 2.52 and DIFF: .049 which creates a motion bowler’s need in their bag! I drilled (2) different Pro Motions. One with a 5-inch Pin to PAP and 50-degree Val Angle and the other with a 4-inch pin to PAP and a 35-degree Val angle. I was able to create a smoother rounded shape with ball 1 and a stronger down lane motion with ball 2. The Pro Motion uses the solid SPEC coverstock also found on the CRUX Prime. A strong and versatile coverstock combined with the new Piston Cores creates a ball shape I was missing in my bag. Sanding the ball to different surfaces from 1000 to 4000 and even adding polish to the bowling ball allowed me to play different parts of the lane and create the ball shape I was looking for at different bowling centers and at local tournaments. Get yours today! #StormNation
0 of 0 people found this review helpful.
Jasper Liauw
September 14, 2019
It's a really good ball
This ball is amazing, its really consistent when I miss right it always goes back to the pocket, never overhooks, great for kegel's house pattern
0 of 0 people found this review helpful.
September 4, 2019
Just a bum looking like a pro!
This is a quick review of the Pro-Motion. This ball is as advertised, smooth and continuous. I am a player that tends to have a sharp reaction off of the spot and this ball truly just rounds out the shape and continues on the backend. This is my first run with the SPEC coverstock and it has resisted lane shining to date.

A second one with a stronger layout is going to join my bag. Why? Where I bowl as a crazy puddle in the middle that forces you in and makes it hard for the ball to slow down but the dry is CRAZY by the middle of game two.

Weight: 16#
Surface: OOB
Layout: Pin over the ring finger
0 of 0 people found this review helpful.
September 3, 2019
Great down and in ball!
A very powerful and consistent ball to play up the boards. A lot of energy as it drives through the deck. Great ball especially for strokers!
0 of 0 people found this review helpful.
John stegall
September 1, 2019
This ball is great
Just got this ball the other day and it works great just like I hope it would I would definitely recommend getting it
0 of 0 people found this review helpful.
Sean Neidhold
July 21, 2019
The Pro Motion ball has a great reaction on medium oil patterns. I love this ball so much.
0 of 0 people found this review helpful.