Roto Grip

Roto Grip Tour Dynam-X Bowling Ball

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  • Roto Grip Tour Dynam-X Bowling Ball
  • Roto Grip Tour Dynam-X Bowling Ball
  • Roto Grip Tour Dynam-X Bowling Ball
MSRP: $239.95
— You save $75.00


Roto Grip Tour Dynam-X Bowling Ball

  • Color: Dark Cyan / Onyx
  • Coverstock: Tour Trax Solid
  • Weight Block: Rondure Core
  • Factory Finish: 2000-grit Abralon
  • Flare Potential: High
  • Radius of Gyration (RG): 16lbs - 2.48; 15lbs - 2.47; 14lbs - 2.52
  • Differential (Diff): 16lbs - 0.026; 15lbs - 0.026; 14lbs - 0.026
  • Intermediate Differential (Diff): 16lbs - 0.010; 15lbs - 0.011; 14lbs - 0.008
  • Fragrance: N/A

Additional Product Information:

From day one, the end goal was to develop and create a high-performance ball from a completely different dynamic performance-focused perspective. Tour level players and above average bowlers from around the globe have always asked for a ball that produces control and continuation with minimal direction change in order to battle those tougher and more demanding and over reacting conditions. They spoke, we listened! So, we went to work to formulate and create the ultimate “TOUR PLAYER” ball. And truth be told, after months and months of trials and errors, we were finally able to construct the optimum control and continuation for every style of bowler no matter their rev rate. Control, stability, and versatility unified into one dynamic ball that is a must for every single serious or semi-serious bowler.


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Additional Information

Lane Condition:
Factory Finish:
Sanded 2000 Abralon
Core Type:
Solid Reactive
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39 Reviews

  • 5
    Roto Grip Tour Dynam-X

    Posted by Kevin Duncan on Nov 26th 2023

    Roto Grip Tour Dynam-X Layout: 4.5 x 5 x 2 Storm Pin Buffer Layout Rev Rate: 325 rpm, 7 degree of axis tilt, 40 degree of axis rotation Testing information: 41 foot THS (medium to light volume) Bowling Center: Fulton Bowling Center Kegel Machine – Brunswick Anvilane The Roto Grip Tour Dynam-X utilizes the Tour Trax solid coverstock and the Rondure weight block. My first thoughts are control and versatility. The Dynam-X is another option in that iQ Tour space. The Dynam-X can be thrown from straighter angles early and deeper angles later in the blocks. It will never be the ball to cover the most boards but can be thrown from left to right with modest board coverage. We had the Dynamix a touch stronger than the iQ Tour, which has to be the coverstock. The Tour Trax is a new generation solid coverstock that blends the trust-worthy Versatile Traction Control (VTC) coverstock from the Hustle line with some new additives to create a versatile bowling ball. Visit your local Storm VIP Pro Shop! #Stormnation #SquadRG

  • 5
    Very Unique Shape

    Posted by Brad Paynter on Nov 20th 2023

    The Tour Dynam-x is very unique, and for a good reason. It doesn’t over-flare, and allows you to keep your angles in front of you without sacrificing carry. As someone who too often moves left ahead of the curve, this ball allows me to stick to the right, play the proper part of the lane, and let the ball do the work for you. Amazing work by the SPI team on this ball.

  • 5
    Roto Grip Tour Dynam-X

    Posted by Brian Watson on Nov 16th 2023

    Newest addition to the Roto Grip HP3 line is the Tour Dynam-X. The Tour has a strong solid coverstock with a low rg (2.47)and low diff core (0.26). This is a unique combination. We really haven't had that combo in a ball from SPI. So hats off to the design team! I drilled mine with a pin up 4 inch pin. I have used the Tour on a bunch of patterns, very versatile. Its kind of cover strong like the IQ Tour solid. Ive been able to play inside 4th arrow and played up the lane around 1st arrow with the Tour. The cover responds with all kind of surface adjustments, whether it is with Abralon pads or step 2. The downlane reaction is probably a little on the slow response side, but the Tour for me carries real well. The Tour is kind of between an asymmetrical and a symmetrical ball. Even though the Tour is an asymmetrical ball, but with the lower diff it fits in between. Great ball to have in your bowling ball arsenal. Brian Watson PAP - 3 7/8 up 1 1/4 RPM - 400 TILT - 17 MPH - 16-17 Storm Pro Shop Staff

  • 5
    Roto Grip Tour Dynam-X review by Ethan Fiore

    Posted by Ethan Fiore on Nov 15th 2023

    The Tour Dynam-X is our new solution for urethane! The Tour Dynam-X has our Rondure Core that was in the Rubicon Series, and the Tourtrax Cover. I see this ball being useful with a lot of friction. It has an early and controllable shape which you will see in a lot of urethane balls. But the low differential, this gets you as close as possible to that exact shape. Ethan Fiore ⭐PBA Member⭐Roto Grip Staff⭐CoolWick Staff⭐Tournament Director⭐ Right 2 Handed Rev Rate: 500 Speed: 17.5 PAP: 4 1/8 up 7/8

  • 5
    Storm Virtual Energy Blackout review by Ethan Fiore

    Posted by Ethan Fiore on Nov 15th 2023

    The Virtual Energy Blackout is a throw back to the original Virtual Energy. They kept the Shape-Lock HD Core but paired it with the successful REX Pearl Cover that you see in the Dark Code. This ball won’t be everyone’s go to game one ball but during the transition phase, this thing is a monster. It helps control your backend motion and doesn’t limit you to going left. This ball will be very popular and you should get one! Ethan Fiore ⭐PBA Member⭐Roto Grip Staff⭐CoolWick Staff⭐Tournament Director⭐ Right 2 Handed Rev Rate: 500 Speed: 17.5 PAP: 4 1/8 up 7/8

  • 4
    Tour Dynam-X

    Posted by Keith C on Nov 15th 2023

    My Specs: PAP: 4 7/8R 7/8up Revs: 350 MPH: 15 at pins Layout: VLS 3 3/4 x 4 x 3 5/8 Pin Down The Roto Grip Tour Dynam-X is a bowling ball that delivers control, stability, and versatility on tough and demanding lane conditions. It features the new Rondure Tour core, which has a very low total differential and a mild intermediate differential, creating a smooth and stable motion from start to finish. The coverstock is the new Tour Trax Solid Reactive, which has a rough 2000 Abralon finish that helps the ball pick up early and provide a controlled arc at the breakpoint. The Tour Dynam-X is ideal for bowlers who need a ball that can handle over-reacting or shorter patterns, as well as for those who prefer a rounder shape down lane. The ball can also be adjusted with different surface preparations or layouts to suit different styles and preferences. The Tour Dynam-X is a must-have for serious or semi-serious bowlers who want to compete at the highest levels of the sport. For my Tweener style I can describe the TD as an asymmetrical Hyped Solid. Not my first ball option in league, more of a third gamer on a THS due to my lower rev rate and speed. and not wanting to get steep with my angles. Great ball to keep in front of you when you need that control at the breakpoint or when you a readable shape. No lack in confidence when it comes to execution and continuation at the pin deck. Definitely a ball to have in your arsenal for the semi-serious and serious local THS tournaments and shorter sport patterns bowler. VISIT YOUR LOCAL VIP PROSHOP TODAY! #SquadRG #Stormnation #GoGlobal #JopoGrips

  • 5

    Posted by Chris Freeland on Nov 11th 2023

    Roto Grip Tour Dynam-X Coverstock: TourTrax Solid Reactive Core: Rondure Tour Factory Finish: 2000 Abralon Layout: 4 x 4 x 2 The Dynam-X quickly found a way into my league and tournament bag. It provides control and continuation while still having a nice strong reaction. I am not sure I have ever thrown a ball that does what the Dynam-X does on the lane. It pops off the dry but isn't anything resembling angular. The other control piece in the HP3 line is the TNT, which is a lot earlier than the Dynamic-X. The shiny options in the HP-3 line are the TNT Infused and the Duo. The Infused and Duo are clean and responsive to friction, much more so than the Dynam-X. The addition of the Tour Dynam-X allows Roto Grip’s HP3 line to cover a lot of bases of ball reaction. The Tour Dynam-X is a well rounded ball that covers a lot of bowlers and skill levels, especially in today's high friction lane environment where slow ball speed is a killer and controlling hook is king. Chris Freeland Storm Amateur Staff Average Rev Rate 400 Average Speed 18 mph PAP: 4 1/8 over 3/4 up

  • 5
    Ball of the Year

    Posted by Johnny Quach on Nov 9th 2023

    One of the most versatile balls ive ever thrown, ive used it on short, medium, and long patterns, ive used it on house shots all across houston, its the first ball in the bag and first ball on the lanes. It takes everything i love of the iQ tour solid and makes it asymmetrical, which means i can get further left without worrying if its gonna miss the spot or be too clean. It hooks early without losing energy, it recovers when you miss out, ive never had a better stretch of weeks in league with any other ball, it still rolls great with surface or with lane shine, its just a great ball for any player. I am a two hander with about 450 revs but i feel like ive seen so many people match up with it, from up ten dumpers to regional tour guys, and especially some pros. Ive drilled two, with another one coming soon. Layout: 50x5x50, 40x5.5x35, next one will either be 50x2.5x60 or 40x4x40 to be even earlier and stronger Watch this youtube video over it: And the rest of the videos on our channel at Striking Results Pro Shop

  • 5
    Roto Grip Tour Dynamx Ball Review by PJ Haggerty

    Posted by PJ Haggerty on Oct 31st 2023

    One of the newest additions to the HP3 line at Roto Grip is the Tour Dynamx. After drilling several balls a year from the Utah plant, I’d have to say this is one of the more unique ones I’ve drilled. Bowling as a game is evolving with the urethane rules frequently changing, and I believe the Tour Dynamix is a ball that can be used to try and replicate a urethane-type reaction while still throwing reactive. The numbers, characteristics, and shape of the Dynamx are unique and I think, impressive. The coverstock is extremely strong. It’s wrapped with the Tour Trax coverstock and inside is the Rodure core. With that combination, the numbers come out to 2.47 RG, .026 differential, and .010 PSA. With the differential being very low (IQ Tour levels), the Dynamx doesn’t flare a lot. When you drill it, I’d recommend drilling it closer to 4-4.5” from your PAP to make sure it flares enough. Don’t be shocked when you look at the oil lines and they are extremely tight together. It’s perfectly normal. However, when you throw it, this ball will read early, often and feel very strong. I think this could be a great ball to use to combat some of the urethane battles bowlers have. With a strong cover and low diff, I think this will eliminate a lot of that over/under bowlers notice when they are following urethane or having to complete against it. I’ve drilled one so far and really like it. It’s drilled with the pin below my ring finger with a good size shift of the CG and mass bias. The numbers come out to 4.5 x 3 x 30. I’m keeping this one relatively dull too. I’ve kept the surface at 2000 to make sure when it use it, it picks up and goes through the pins the right way. This ball is awesome! Just make sure you drill it stronger to assure it will flare enough!

  • 5
    Tour Dynam-X Review by Luke Rosdahl

    Posted by Luke Rosdahl on Oct 24th 2023

    User Specs: Left handed, 375 rev rate, 17mph speed, 45 degree angle of rotation, 7 degrees tilt Layout: 4 ¾ x 3 ½ x 2 ½ The Tour Dynam-X is a new mildly asymmetric ball in Roto Grip’s HP3 line. It features the new TourTrax cover which is medium to lower strength. The core is the new Rondure Tour core, which shares the shape of the original Rondure core from the Rubicon series, but the density has been adjusted to lower all 3 numbers down to 2.47 for the RG, .026 for the differential, and .010 for the intermediate differential in 15 pounds. On paper, this is a mildly asymmetric IQ Tour type of ball. The box surface is 2000, and it’s surprisingly strong at this surface. However, because it’s a medium to lower strength cover, it weakens significantly as it shines. However again, this makes it incredibly versatile. With surface it has the traction and stability to be in play on tougher sport patterns, and with shine it’s surprisingly usable and effective on league patterns. The super lower RG helps the ball control the midlane, while the low differential and mild asymmetry helps keep it very stable and controllable. The Tour Dynam-X feels like a smoother and weaker version of the Phaze 2. The shape is identical, the same slightly directional arc that’s very responsive to hand changes and physical adjustments. I think it’s an evolution of the IQ Tour Solid in that it does all the same things the IQ Tour does, but the versatility is increased substantially. Like I mentioned, the TDX is a step down from the Phaze 2 but a step up from the Hustle RIP.

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