Roto Grip Duo Bowling Ball

(17 reviews) Write a Review

Roto Grip is proud to announce its partnership & support of Big Brothers Big Sisters of America. With the assistance of our very own mentoring duo, “The Shafanie Duo”, we will not only be supporting BBBS at various events across the country, but we will also be donating 5% of our sales to domestic distributors to aid in the development and support of children within the program. So, if you are looking to make a difference both ON and OFF the lanes, then the DUO is the right choice for you!

Color Black/Electric Green
Coverstock MicroTrax™ Pearl Reactive
Core Mentor™ Core
RG 2.49
Differential 0.046
Intermediate Diff n/a
Factory finish Reacta Gloss
Weights 10 thru 16lbs

17 Reviews

  • Roto Grip Duo

    Posted by Chase Valenzuela on Jun 5th 2023

    The Duo is the newest strong symmetrical pearl ball in the lineup. The combination of the low RG and strong coverstock make this ball very smooth for a pearl ball. I find that the shape is very even and readable. This ball reminds me somewhat of a Zen, due to its heavy rolling nature and slower change of direction. I think overall the Zen is still stronger. While i can often start with the Zen game 1, i have found Duo to be better as a 2-ball or transition piece. If you are speed dominant or have higher tilt/rotation, this is a great pearl option because it revs up quickly and creates a smoother transition from skid to hook to roll, but still creates some length through the middle part of the lane.

  • Roto Grip Duo

    Posted by Chris Freeland on Jun 4th 2023

    Roto Grip Duo Coverstock: MicroTrax Pearl Reactive Core: Mentor Factory Finish: Reacta Gloss Layout: 4 x 4 x 2 The Duo is Roto Grip’s new HP3 line release. First, it is important to note that 5% of the sales of the Duo will be donated to Big Brothers Big Sisters to aid in the development and support of children. HP3 is generally in the benchmark range of balls. In the Duo, we have the Exotic Gem coverstock (MicroTrax Pearl) and the Mentor core inspired from the Daredevil series from a while back. I do like my Exotic Gem, but sometimes the window of use is small for me because it is very strong and that leads to bad carry when it starts to stand up a bit too early. But, in the Duo we have a core with a larger zone of use that matches up well with the MicroTrax Pearl cover. I find the Duo to be the perfect transitional ball after the Exotic Gem. It slots in right before I go to my IQ Tour Ruby as the Ruby is about an arrow weaker and stair steps off the Duo very well. I think the Duo will match up for many styles of bowlers looking for an all around good ball to cover a variety of lane conditions encountered in league and tournament bowling. Chris Freeland Storm Amateur Staff Average Rev Rate 400 Average Speed 18 mph PAP: 4 1/8 over 3/4 up

  • DUO

    Posted by DUO on Jun 1st 2023

    DUO - Ball Specs Color: Black/Electric Green Cover Stock: Micro Trax Pearl Reactive Finish: Reacta Gloss Core: Mentor Core RG: 2.49 Differential: 0.046 Review Roto Grip is proud to announce its partnership & support of Big Brothers Big Sisters. With the assistance of our very own mentoring duo, “The Shafanie Duo”, we will not only be supporting BBBS at various events across the country, but we will also be donating 5% of our sales to domestic distributors to aid in the development and support of children within the program. So, if you are looking to make a difference both ON and OFF the lanes, then the DUO is the right choice for you. The DUO is the newest ball in the Roto Grip HP3 line. Roto Grip has combined the mentor core wrapped with the Micro Trax Pearl cover. The DUO is a little cleaner than Idol Cosmos, which allows me to play further to the right and stroke the ball. The DUO reads the midlane well with a strong reaction on the backend. This ball will be great for the second to third game of league. This ball will be in my bag for league and tournaments. Order one from your local pro shop today! My ball review videos are posted on YouTube channel Stanley Waite. Stanley Waite 900 Global Staff Member Dover, DE

  • DUO by RGR

    Posted by Roto Grip Rick on May 31st 2023

    Roto Grip DUO: Tech specs: New Mentor core / Micro Trax Pearl Reactive / Finished with Reacta Gloss Layouts: 60 x 2 x 40 and 70 x 4 x 30 My take: Drilling the DUO with a layout I love in my Roto Grip Hyped Hybrids – YES – that is PURAL, and Hyped Pearl, the reaction I saw was earlier and stronger then what I was anticipating even on Pro Lane with a heavier volume house pattern, the motion in all three stages were quicker in response. Even if I got in really deep – nose bleed area for my lefties of my caliber of game, the flare amount look like it had a strong 4” pin drilling. So at the recommendation of Earl Burger at ABC North in Harrisburg, we layout and drilled my second DUO at 70 x 4 x 30 and what a difference that made. The 2nd DUO became more predictable for the conditions that I bowl on and gave me the “look” I was hoping for. The roll through the pins was AWESOME and my first 5 games with the 2nd DUO were all 30 pins above my average. Anytime a ball can help you improve your average and game – its worth the investment. THE BEST thing about this ball is the purpose behind it – To raise awareness and money for Big Brothers / Big Sisters because a portion of EVERY DUO sold goes to them. Why not buy one or a DUO of them and improve your game and HELP OUT kids also – it is a WIN – WIN situation.

  • Roto Grip DUO review by Ethan Fiore

    Posted by Ethan Fiore on May 30th 2023

    The New Duo from Roto Grip features the MicroTrax Pearl Coverstock and the Mentor Core. When it first went down the lane, I was amazed. It stores so much energy to make crazy angles downlane. I compared it to the Zen; The Zen was a little earlier and smoother down lane. They are definitely compliments to eachother. The Duo is a ball for everyone who likes that big hook downlane. Go get yours! 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

  • Duo

    Posted by Michael Slatky on May 29th 2023

    Roto Grip Duo Coverstock: Micro Trax Pearl Reactive Finish: Reacta Gloss Core: Mentor Core (14 pd) RG: 2.53 Differential: 0.047 Layout: 5.5 x 4 x 4 - 2LS Layout Extras: 2 1/8 Finger Depth, "X" - 4 1/2 D and 1 Inch Left Tester: PAP 6 1/2 R, 1 1/4 D Review: The Duo reunites with the daredevil series from awhile back. The goal of the Duo is to provide a controlled reaction in a pearl coverstock. Previously, some pearls have created to much "hockey stick" reaction which can place a bowler at a disadvantageous position when balling down. The Duo quite nicely provides some forgiveness in the RG line. For a pearl offering, the Duo provides a decent amount of length and smoother backend. I personally chose a 2LS layout of 5.5 x 4 x 4 to gain a touch more length and slightly more backend. The layout we chose on the Duo tested out nicely. For me, the Duo oob pearl surface was perfectly fine. However, I tend to always lightly touch pearls with a 4K or 3K pad. Although not always needed, it is a personal preference of mine. The Duo felt comfortable and had great control off the spot and shots have been repeatable. In comparison, the Cosmos is earlier and a tad smoother downlane. The Duo fits nicely if you need a touch more pop when the Cosmos starts getting a bit early as transition occurs. Having the Duo can be a great asset to be in a pearl that allows you to keep angles in front of you and control at the breakpoint. However, I do need to note my Cosmos is 15pd and my Duo is 14pd, so the numbers are a bit different when evaluating both balls. Also, don't forget when you purchase your Duo you are supporting Big Brothers and Big Sisters as well. Please be sure to visit your favorite pro shop today or for more information. Michael Slatky 900 Global Staff Member York, PA

  • Duo Review

    Posted by Glenn Wendel on May 28th 2023

    Ball Specs: Roto grip Duo Coverstock Micro Trax Pearl Reactive Symetric Mentor Core Finish Reacta Gloss Layout 4 x 4 x 1.5 Pin Buffer Bowler Specs: Right Hand. PAP 5” Over 1/2 up Rev Rate 300. Tilt 20. Rotation 50. Speed at release 17 Review: This new Roto Grip Duo is SMOOTH! I had been hearing about the controllable motion of this ball but was unsure how much it would hook so we drilled one up and went to find out. The Duo borrows a mushroom shape type core from the popular Dare Devil Series constructed to deliver added forgiveness in the back part of the lane. The Duo also reads the mid lane well and not too early which is nice. This ball is a step down from the Exotic Gem in total hook. I would put this ball in the medium category in total hook and shape. The Duo carried light hits with power for a smooth back end type ball. I would say this would be a great ball when the Exotic is too strong or you need control on the back end of the lane. I will be drilling my second one up and add some surface to see how it rolls on higher volume. My guess is this would be a great plan for sport shot patterns. I feel higher rev rates will love the Duo. As an added boost Storm will also be donating 5% of our sales to domestic distributors to aid in the development and support of children within the program. You can buy a great ball and give back at the same time. Summary: The Duo has a very nice smooth motion. The Color is different and looks great. Portions of the sales will help Big Brothers and Big Sisters! Glenn Wendel PBA Member Storm Pro Shop Staff Video Link:

  • RG Duo

    Posted by Oliver Lawson on May 26th 2023

    The Duo is a a collaboration between Roto Grip, Big Brothers Big Sisters, and the Shafani Duo. The all new Mentor Core (named after those who are Big Brothers/Sisters) is wrapped in MicroTrax Pearl coverstock that has been featured as recent on the Exotic Gem. I drilled by Duo 4.75x4x4 2LS to help me get a consistent roll off the spot and see a strong smooth reaction. I have this same layout on my Fate and my Phase V, and I see 3 very different shapes of ball reaction. The Duo is considerably more forward off the spot and reads the midlane the earliest out of the three. The Fate is the strongest and has a much more continuous backend motion. The Phaze V goes easily 3-4ft more down lane before it starts to pick up and drive towards the pocket. The Duo is going to be filling the same spot in the bag as my Zen as it is quite possibly even more controllable. The Duo wants to pick up in the midlane a touch sooner than my Zen has in the past and is stronger on the backend. If you need something that is as good looking on the lane as it is off the lane, then the Duo is right for you. I will not often say that everyone needs a certain ball in their bag, but the Duo might just make that case for me. Visit your Local Storm VIP Proshop today to make a difference on and off the lanes with the Roto Grip Duo.

  • The Winning Duo!

    Posted by Rick Klimowicz on May 26th 2023

    Duo • Roto Grip •HP3 Core • Mentor Core (Symmetrical) Coverstock • MicroTrax Pearl reactive • Finish Reacta Gloss Weight • 15 lbs. RG • 2.49 Differential • .046 Layout •4 x 4 x 2 ¼ Tester PAP • 5” R, 5/8” D Tester Axis Tilt • 11° Testers Rev Rate • 300 Test Pattern • 42' THS (Typical House Shot) • Modified, Kegel Stone Street Are they helping the next generation? Roto Grip is doing precisely that with their release of the Duo. Partnered with Big Brothers and Big Sisters, your Duo purchase will not only be helping the next generation, but your Duo will also bring a smile back to your A game! You will love it, especially if you are a down-and-in player like me! So, let's take a closer look at what makes the Duo worth the purchase! The Mentor Core is at the heart of the Duo's success. I like how the Mentor Core's symmetrical "mushroom" look produces a smooth and robust rev'ing motion later in the mid-lane versus rev'ing too early upfront, causing it to lose all its gusto down the lane. And if you're a straighter player like me, you will love the results of the puck block added to the bottom of the Mentor Core. The puck block helps the Mentor Core stand up later as it makes its turn off the pattern. And because it doesn't overreact when it finds friction, the Mentor Core creates a dependable margin of error the Duo can recover from while still maintaining a strong continuation through the pins. So, if you're a down-and-in player who likes to play right of the second arrow, then the Mentor Core was made for your game! The MicroTrax Pearl Reactive Coverstock gives the Duo an excellent appeal. However, I am a proponent of the correct surface to match the bowler. So, I tweaked the surface of my Duo to 1000-Grit Abralon and followed that up with Storm Step # 2 compound for my straighter, rev-challenged hand. And this surface combination brought my A game to a fun and high-scoring bowling night. I liked how the MicroTrax Pearl had strong traction in the mid-lane but still allowed the Duo to retain a lot of energy off the pattern. And as the night went on, I liked how the MicroTrax Pearl smoothly blended the over/under conditions that developed throughout the night without losing its crisp turn-off pattern. And lastly, the MicroTrax Pearl allowed me to stay in my comfort zone all night as it gave me the confidence to play right of everyone else! In conclusion, Roto Grip has produced a winning release with the Duo. The Duo is a predictable and consistent powerhouse for my straighter and more classic game. So, I highly recommend the Duo to any down-and-in, low-rev bowler looking to boost their game. And what better way to improve your game than by helping the Big Brother, Big Sister Organization make a difference to our next generation with the purchase of your Roto Grip Duo! So, stop into your local Storm VIP Pro Shop today and see how everybody wins with the purchase of Roto Grip Duo! Rick Klimowicz Storm Products Pro Shop Staff Roll the Ball Pro Shop Penndel, PA

  • Zen 2.0?

    Posted by Steven Collins on May 23rd 2023

    Dual Angle Layout: 55 x 4 1/2 x 25 Pin Buffer Layout: 4 1/2 x 4 1/2 x 1 5/8 Wow this ball is good, dare I say the Zen 2.0? This ball is clean through the heads, picks up nicely in the mid lane and then pops off the end of the pattern. I really like how I know when I throw it right that its going to recover and drive through the pins. I put the same layout on this ball as I did my original Zen and if it was not for the awesome color scheme I wouldn't know it wasn't a Zen. Plus 5% goes to the Boys and Girls Club, yes I'll take another one.

  • Roto Grip DUO Review

    Posted by Tobias M on May 20th 2023

    The Roto Grip DUO features the MicroTrax Pearl Reactive cover, Mentor Core, and comes with the reacta gloss finish. The DUO features the same cover that is on the Exotic Gem. This ball feels like a symmetrical Exotic Gem to me. It shapes very similar but just a bit weaker from the core. I threw the Exotic Gem as a comparison and it was a bit earlier and harder off the spot for me. I also compared it to the Zen and the Zen picked up a touch earlier but was smoother/rounder off the spot. The DUO, for me, is forward off the spot and when it sees friction, it goes left. I think when you need something when the Exotic is picking up too early the DUO will be a good ball down. This ball is another great release from Roto Grip! Tobias Myers #RotoGrip

  • Review

    Posted by Storm Andrew on May 15th 2023

    We have a new ball plugging the gap in our arsenals with the new Duo from Roto Grip. This ball is a perfect benchmark pearl for those medium to heavier oil conditions. A step up from both the Zen and IQ Ruby yet a step down from our Exotic Gem. Out of the box I found the cover to be clean through the fronts and smooth off the backend. When I hit it with 2000 the ball picked up much sooner conspicuously yet it angled a lot better than when I had it out of the box. When the higher end asyms or solid syms become too much the Duo will be a great ball to jump into. We have not seen a ball like this since the Idol pearl and Axiom pearl. The shape that the Duo provides is extremely user friendly and will provide tons of margin on today's conditions. The ball is very forgiving and should match up to many bowling styles. I believe this ball will be very adaptable to different lane conditions from sport to house.

  • Roto Grip Duo

    Posted by Matt Fazzone on May 14th 2023

    Roto Grip’s most iconic line has another new piece coming to it. The Roto Grip Duo features the brand new Mentor Core that yields an RG of 2.49 and differential of 0.046 and is wrapped around the ultra popular microtrax pearl cover. I drilled mine 5.5 x 5 x 5 which is also the same layout as my Exotic Gem. After throwing my Duo for awhile, I was quite impressed on the strength and shape this ball gave me. It was like a little clean benchmark type motion or a better comparison would be a baby Exotic Gem. I can see a lot of people using this as a multi purpose ball. They could either use it on the fresh as a benchmark ball or something as the lanes start to transition. Also Storm is donating 5% of all sales of the Duo to the Big Brother, Big Sister Foundation!

  • Roto Grip Duo – WWRD 5/19/23

    Posted by Patrick Dombrowski on May 13th 2023

    Cover: Micro Trax Pearl Reactive Core: Mentor Symmetric RG: 2.49 RG. Diff.: 0.05+ Finish: Reacta Gloss Roto Grip’s new Duo is a Pearl Symmetrical piece that is good for Medium Oil conditions. PAP is 5 5/16 R 1 3/16 Up. Rev Rate: 400. Speed: 16.5. Drilled this piece with the Pin up between the fingers with the CG kicked out 2” from the palm. Out of Box ball motion started a little early in the mids with a smooth backend reaction. I changed the Surface to 3000 Abralon and was a similar motion through the fronts with a little more on the backend. I compared this piece to the Roto Grip Idol Cosmos and Storm Fate. Idol Cosmos was a few weaker than the Duo. The Storm Fate is 2-2 Stronger than the Duo. Fate has a cleaner shape through the front with a sharper backend. This piece will be in my bag cause of the versatility it will bring on tournament patterns. Plus, 5% of all sales will be supporting the Big Brothers and Big Sisters of America. Check Out the Ball motion Video on my YouTube Page:

  • Very Impressed!

    Posted by Todd Pawlak on May 11th 2023

    1st off I want to say Roto Grip is in partnership with Big Brother Big Sisters, and donating 5% of its sales to them. How great is that?! Now performance wise, I was pretty amazed. It rolled very well. Some people are different, no one is the same. For me...I had to hit it with a 3000 pad to calm the back end snap down. Then to read the mid lane reaction a little better. In my eyes, It almost reacted on the back end like a 900 Global Zen. I love the new Mentor core! rolls for me very well, especially on sport patterns. Its very easy to read mid lane. Then with the Microtrax Pearl Coverstock, this ball is in my bag!

  • Duo

    Posted by Casey Mattingly on May 9th 2023

    I am so excited about this ball! This is probably my favorite release of this year, for so many reasons! First of all Stef and Shannon have put their heart and souls into this ball and it’s a dream come true for them. Secondly the fact that they teamed up with Big Brothers Big Sisters of America to give back is such a noble gesture. Lastly the performance of this ball is AMAZING! This ball has the same cover as the Exotic Gem and a core similar to the famous DareDevil line. The DareDevil line was one of my favorites of all time! The Black and Bright Green color not only pops as it goes down lane but its also my wedding colors :) Performance wise, this ball actually is very close to the Zen but with a little more pop off the spot. This actually makes it more useable than the Zen, for me. The new factory polish has been a topic of discussion for a while but the surface prep for this one is perfect. I’m ready to get to the lanes and get to using this ball in competition! My layout is 5x4x2 Balls getting a lot of play Infinite Physix: 5x4x2 Eternity: 5x4x2 Phaze4: 5x4x2 Fate: 5x4x2

  • Duo

    Posted by Adam Chase on May 2nd 2023

    Layout: 5.5 x 3 x 3 Surface: Reacta Gloss The new Roto Grip Duo is the newest HP3 pearl/angular ball in the lineup. What is great about this ball is the relationship between the Shefanie Duo of Stephanie Johnson and Shannon O'Keefe as well as the relationship between Roto Grip and Big Brothers, Big Sisters! 5% of all domestic sales of the ball goes towards Big Brothers, Big Sisters which is great!! The Duo brings an all-new core called Mentor which brings core specs, Roto Grip has not seen in quite some time. At a 2.49 RG and a 0.046 Differential, you will see an earlier rolling and medium strength ball reaction which makes it weaker than the current Idol Cosmos. The weaker core allows for more length and a more angular backend motion as a result. The Microtrax Pearl coverstock is brought back from the Exotic Gem. The Microtrax Pearl coverstock is a little stronger in nature than some of the other pearl coverstocks. As a result, that will provide more overall hook and will be able to handle more volumes of oil more consistently. I was able to test the Duo on two different oil patterns, a 43ft 32ml sport pattern and the typical house pattern. On the house pattern, I saw a lot of length and a very angular backend motion. I was pretty surprised how angular the motion was. The core was clean enough for me to play straighter on the fresh and then continue to open up the lane as the oil started to go away. Compared to the Idol Cosmos, I saw about 2 more feet of length with a more angular backend. The Cosmos is better on the fresh as it controls the front part of the lane more giving me more area down the lane to the pocket. As the lanes broke down, I was able to go to the Dup very simply. It gave me the shape that I am looking for: length and strong backend. The Duo is going to be a very good ball for game 2 and 3 of typical league. If your lanes have less oil than typical, this could be a good ball for the fresh as well. On the 43ft Sport pattern, the reaction I had was pretty typical for an angular ball. It was tough to control on the fresh due to its quick response and was harder to go up the lane more early on. On the fresh, I had to use a stronger asymmetrical control ball in the Storm DNA to get to the pocket consistently. As the DNA, started getting too slow in response, I was able to go to the Duo. The Duo actually presented stronger on the sport pattern than the house pattern. It felt a little stronger overall than what the core specs said it would be. This was very helpful for me as it read the higher volumes of oil much better while still giving me enough backend motion. Due to my higher rev rate, I was actually able to open the lane up more to the right than I would have expected with this Duo. I can see this ball being a great tournament and house pattern ball for multiple styles. Not only does the ball pop off the shelf, but it gives great overall ball motion and it rolls as expected for an angular HP3 ball. It is a nice step down from the Exotic Gem and a more angular version of the Idol Cosmos. Adam Chase Storm Staff