Roto Grip

Roto Grip Duo Bowling Ball

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  • Roto Grip Duo Bowling Ball
  • Roto Grip Duo Bowling Ball
  • Roto Grip Duo Bowling Ball
MSRP: $219.95
— You save $55.00


Roto Grip Duo Bowling Ball

  • Color: Black/Electric Green
  • Coverstock: MicroTrax Pearl Reactive
  • Weight Block: Mentor Core
  • Factory Finish: Reacta Gloss
  • Flare Potential: Medium-High
  • Radius of Gyration (RG): 16lbs - 2.47; 15lbs - 2.49; 14lbs - 2.53
  • Differential (Diff): 16lbs - 0.047; 15lbs - 0.046; 14lbs - 0.047
  • Intermediate Differential (Diff): N/A
  • Fragrance: N/A

Roto Grip Duo Bowling Ball Features:

Dynamic looks – CHECK!… Dynamic motion – CHECK!… The optimum balance of core strength and cover strength to create the most formidable DUO in the history of mankind – CHECK!… Approachable yet progressive, this performance powerhouse will not only assist you in your desire to be better, but it will also leave a long-lasting impression on everyone who comes in contact with it. So don’t just sit there and admire from afar, make a difference in your game and in the lives of others, visit your local VIP Pro Shop and add one to your bag today.

Dynamic power to the core, the symmetrical Mentor™ Core was built to produce plenty of positive motion. From its mushroom/bulb shape structure to the heavy density flip puck on bottom, (to give it extra giddy up) this part was constructed to deliver added forgiveness in the back part of the midlane and down lane where you need and want it most. To be perfectly honest, this latest addition to the HP3 family of cores was erected and developed from the inspiration of the Madcap™ Core numbers (DareDevil™ Series) from yesteryear. It’s ok, you can thank them later.

This coverstock technology is a banger regarding performance in the pearlized category . Featuring a 100% nanoparticle load dispersed evenly throughout, this pearlized concoction provides traction and response to friction while maintaining its surface profile over a longer period of time to ensure you get maximum performance each and every time. For the record, the pearl version of MicroTrax displaces oil at the highest rate of any of the pearl covers RG offers today. Basically, as their token of appreciation and thanks to you, they gift you added forgiveness on those not-so-great shots off your hand.


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Additional Information

Lane Condition:
Factory Finish:
Reacta Gloss
Core Type:
Pearl Reactive
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50 Reviews

  • 5
    Awesome step down from Exotic

    Posted by Bracken on Sep 22nd 2023

    I love the control I have with this ball! Perfect step down from the exotic gem. Never worried about missing my mark because it comes back when I miss out and holds when I miss in. Truly love this ball. Also Buddies hit the mark with the drilling again. Thank you

  • 5
    RG Duo

    Posted by Cooper Mathewson on Sep 16th 2023

    The Roto Grip Duo Latest addition to the HP3 line RG 2.49 diff .046 Mentor Core MicroTrax Pearl Cover The Duo is so much more versatile than I expected. When I ready the Core #'s and saw the cover, I assumed this would be a very forward rolling ball. It has proven me wrong and can be used by many different styles on many different patterns. I can get left and swing it or stay straight and work its forward roll. I have seen the Duo skid for others that usually need help getting the ball down the lane. It's not going to be a hockey-stick skid/flip but also not early and flat. This is one that should be very common at leagues, with many different styles benefitting from it's versatility.

  • 5
    Roto Grip DUO!

    Posted by Mitchel Guzzle on Sep 16th 2023

    Ball Specs: Ball - Duo Core - Mentor Coverstock - MicroTrax Pearl Surface Finish - Reacta Gloss Finish VLS Layout - 4.25x4x2 Bowler Specs: Right Hand 14 - 15 out of hand Tweener Speed/Revs matched PAP: 5 ⅜ over x ⅞ up Lane Condition: THS Review: A strong pearl symmetrical, something that you cannot really go wrong with. We have the 900 Global Zen, Storm Fate, and Idol Cosmos (discontinued recently). Adding the DUO to the line was an awesome move. I won;t sugar coat this. This ball is NUTS. Think about it, you have the Mentor core, which provides strong flare and hitting power, and the same coverstock that is on the Exotic Gem!!! One of the strongest coverstocks in the industry, and we have it on the Roto Grip DUO. The ball hits like a truck. You can watch any ball review, watch any pro throw it, and you will see this ball bury the pins. The help from the microtrax coverstock is insane. When I heard that this ball had that coverstock on it, it was going to be an immediate buy and I was going to recommend it to my friends. The DUO provides a clean transition through the fronts and midlane, but it really like to start revving up once it gets closer and closer to the dry. Some of the weaker balls we have in the SPI line like to miss skid just a tad further, so taking layout into consideration is extremely important. Whether we played right, or jumped in left, the DUO responded well to both. From what I saw, this ball shined well playing just inside of the 2nd arrow mark. Bowling on THS, it would hold the line to the pocket if I missed in and was forgiving if I missed right. The strength of the DUO swished around pins like it was nothing and corner pins were not an issue as long as the entry angle into the pocket was not flat. I am extremely impressed with this piece and I hope we get another year out of the ball! Mitchel G. - YT: Fullsendbowling

  • 5
    Roto Grip DUO - Pallet Ball

    Posted by Joel Donner on Sep 15th 2023

    About Me 900 Global Staff Left Handed: High Rev High Speed Player Pap: - 47/8 +1 Rev Rate: +-500 Speed 17 mph Layout: 70 X 3¾ X 30 Ball Video: N/A The Roto Grip Duo is what I like to call a “Pallet Ball.” What I mean by this is that I would love to buy a pallet of them and keep drilling this ball up. The Duo is so clean and controllable from the front part of the lane to the backend. Speaking of the backend, it is so predictable with incredible finishing power. The amount of mistake area that I can create with this ball is ridiculous. This ball is going to be a benchmark ball for me and will be the first ball out of back on any pattern I throw with. The Duo has been able to replace quite a few balls in my arsenal because of the versatility I have in throwing this. It would be in your best interest to get a Duo and put one in your bag, not only will you bowl well with it but 5% is going to go to charity. One of the best balls I have ever thrown and that is saying quite a bit. Joel Donner 900 Global Staff Member Cedar Rapids, IA #StormNation #StrikingWorldwide #RGSquad #Iambowling #teamiambowling #bowlingisfun

  • 5
    Roto Grip DUO

    Posted by Sandy McIntire on Sep 15th 2023

    I am a higher speed, rev challenged 220-250ish, high tilt, high rotation, and super low track player, I drilled my Roto Grip DUO 5x 3 1/2 x 1 3/4 using the Storm VLS and my axis point is 3 ¼ right and 7/8 up. The Roto Grip DUO is middle of the road pearl symmetric benchmark ball that is easy through the front of the lane with great continuation down lane without being too angular. Overall, the ball is responsive and I see myself using this on house shots or medium volume patterns. My YouTube video of the ball can be found at:

  • 5
    Awesome ball for an Awesome cause!

    Posted by Brandon Boyer on Sep 14th 2023

    As soon as I saw one picture of this ball I knew we were in for a good one! First and foremost it is an amazing thing the see Roto Grip and Shefanie teaming up for such a great cause like Big Brothers Big Sisters and donating money from every Duo that they sell! My home center every year puts on a big weekend event for Big Brothers Big Sisters so this definitely hit close to home for me. Now for the ball itself, my first time throwing it was for my reaction video and to say that I loved what I saw would be an understatement! The Duo definitely has given me some good old classic Roto Grip vibes! If you were a fan of the Wrecker or the Uproar then you should absolutely look into getting yourself a Duo because I personally think it shapes up exactly like those 2 balls did. It is definitely a tick stronger tho. It is also a perfect 1-2 punch for me with the Exotic Gem. Very similar shape wise except the Duo is a smidge weaker and a perfect ball down for when the Exotic is starting to lock up. Honestly tho if you haven’t drilled one yet then what are you waiting for!

  • 5
    Roto Grip Duo review by Chris Pollentier

    Posted by Chris Pollentier on Sep 11th 2023

    Roto Grip Duo Coverstock: MicroTrax Pearl Reactive Box Finish: Reacta Gloss Core: Mentor Core RG: 2.49, Diff: 0.046 (15 lbs) VLS Layout: 4 3/4 x 4 x 2 1/2 Dual Angle Layout: 45 x 4 3/4 x 40 PAP: 5 3/16” right x 5/8” up Rev rate: 400 rpm Average speed: 16.5 mph Location: Prairie Lanes, Sun Prairie, WI Pattern: Medium volume THS The Roto Grip Duo is the recent addition to the HP3 line that features the MicroTrax Pearl Reactive cover, same as on the Exotic Gem, and Mentor symmetric core that was partly inspired by the Dare Devil line of balls from a few years ago. All that goodness aside, what really makes this ball special is that it’s the first collaboration between “The Shafanie Duo” of PWBA stars Stephanie Johnson and Shannon O’Keeke, and is in support of a partnership with Big Brothers Big Sisters – with 5% of the sales from the Roto Grip Duo being donated to aid in the development and support of kiddos within the program!! This ball is a performer on the lanes as well. Because it has the same cover as the Exotic Gem, the Duo feels very much like a symmetrical version of the Exotic. The combination of the low RG, mid-differential core and strong coverstock makes this a strong but predictable pearl ball. Because the Duo comes out-of-box with the Reacta Gloss finish, I scuffed the surface lightly with a used 2000-grit Abralon pad like I have with many other balls that come polished just to scratch the surface a bit and knock some shine off. The Duo has thus far proven itself to be very versatile and I believe would be a great ball for most any league bowler as well. The Duo is clean enough to get through the front part of the lane to remain online, and it has a good strong backend reaction that isn’t so sharp that you can’t control it. In most cases, the Duo is the first ball out of my bag; and for league night it’s the only ball I need. If you’re looking for a ball that is cleaner with less overall hook than the Gem or Exotic Gem, but still something stronger than the Hyped and is versatile enough to thrown as the lanes transition – the Duo is it! Chris Pollentier Storm Products Pro Shop Staff #StormNation #SquadRG

  • 5
    Roto Grip Duo

    Posted by Michael LeViner on Sep 4th 2023

    Layout: 50 x 4 ½ x 35 The Duo has about as strong of a late midlane/backend reaction as you can have without it being classified as “skid flip”. The decent amount of midlane read that the Duo has both allows it to have a modicum of predictability and arciness, but overall, this thing can really fly in the back part of the lane! It has become my favorite ball for when strong backend is needed, especially on house shots. I've paired the Duo with the Summit to be a killer combination – the Summit shines on fresh or heavier oil, and the Duo comes out when the Summit starts to pick up too early or when I need to circle the lane more. The bright green and black color combo on this ball is really nice, also.

  • 5
    Roto Grip Duo

    Posted by Mike Craig on Aug 31st 2023

    I drilled up my Duo 5 x 4 x 3. This is my favorite layout for first out of the bag pearl balls. I hit the surface with a light 2000 to crack the shine and smooth the reaction out. I put the DUO up against the SUMMIT and pin under EXOTIC GEM. Just like you would expect, the DUO is dead in the middle of these two. A little later than the SUMMIT and quicker than the pin under EXOTIC. The DUO was at home for me on a middle pattern and flared around 4-5". I feel that the DUO will get play as a first ball out of the bag at places with some early friction burn in the fronts and also when the big solids are starting to lock up and lay flat down lane.

  • 5

    Posted by Todd B on Aug 30th 2023

    The new Roto Grip Duo is the result of a partnership with Big Brothers, Big Sisters. A portion of all sales of the Duo will go to this charity. The Duo features the Mentor core wrapped in the MicroTrax pearl reactive coverstock. The RG at 15lbs is 2.49 and the differential is .046. Drilled at 5x4x2 (pin above the bridge) the Duo reminds me of the original DareDevil, only smoother. The Reacta Gloss finish of the Duo provides effortless length through the front part of the lane and a very strong but predictable backend motion. For a pearl coverstock, this ball does not have that hockey stick shape backend but a much more arcing motion usually found in solid cover stocks. This allows the Duo to be a great choice on the tougher patterns when control is priority number one. The Duo won’t wow you with big backend hook or even overall hook, but it will control the pocket for you and provide excellent pin action. Get a great ball and help a great charity!!

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