Roto Grip Sinister Bowling Ball

The Sinister is a good tool to have in your bag when you have a ton of oil on the lane and nothing seems to be working. This ball will throw those pins around like nothing you have seen before. When you see the pins explode you will feel like you are Belmo. But this ball wont work for you if you are not consistent with your shots! If you miss your mark you will pay the price with a massive split, gutter, or you may be lucky and go Brooklyn. But I recommend this ball if you are consistent with your shot.

COVERSTOCK NAME: 76H™ COVERSTOCK STYLE: HYBRID COVERSTOCK TYPE: REACTIVE WEIGHT BLOCK: CAGE™ CORE COLOR: NEON YELLOW & WHITE PEARL / NAVY SOLID FINISH: 4000-GRIT PAD FINISH: METHOD CAN BE POLISHED DUROMETER: 73-75 ON D-SCALE FLARE POTENTIAL: 7+ INCHES/HIGH WEIGHTS: 12LBS - 16LBS SKU: RIN My layout: 4 x 4 "x 2 My PAP: 4 1/2" over 1 1/4 up Once again the Roto Grip brand has a winner with the Sinister. The ball has been very versatile for me. I have had success with it on sports shots as well as house shots. The hybrid coverstock helps the ball get through the heads, and at the same time it reads the midlane early enough to be used in heavy oil conditions. The backend on the Sinister is phenomenal as it recovers from places most balls don’t recover for me. It is a very powerful ball and you will see that when you see how hard the sinister hits the pins. Another positive about the Sinister is I been able to keep it in my hands longer than most heavy oil balls. It doesn’t burn up and slow down as fast as some other powerful balls that I have used. The Sinister by Roto Grip is a winner and it has earned it way into my tournament bag.

I had my ball drilled with the pin down above the fingers. This provided me with a strong midlane roll and a very effective continuous, backend! This ball gives provides the hooking power and reaction I need on the longer oil patterns. The new Cage core along with the 76H hybrid coverstock gives me the look and the down lane reaction I am looking for. With this cover I don’t have to worry about the lanes getting burned up. This ball gets through the head and maintains its power all night long. What a great addition to the HP4 line and my arsenal. The Sinister is my first ball out of my bag on sport shot or tournament condition. Mike Johnston Roto Grip Staff

The Roto Grip Sinister is the new hybrid high performance asymmetrical ball, in the HP4 line of balls. It has a new weight block called the Cage core. The cover is called 76H, and has a factory finish of 4000 grit abralon. The core numbers come in at 2.52 Rg, 0.054 diff, with a 0.015 PSA differential. The Sinister is neon yellow and white pearl, with solid navy in color. The guts grit and grime of the ball is 82-76-H. I drilled the Sinister with a 4 ¼ x 6 x 2 ¾ layout. This puts the pin up and just slightly left of my ring finger. I used the Sinister in the box finish and saw a ball that has a lot of overall motion. When using the Sinister in a regional in Syracuse NY, I had a great reaction on the fresh, and also through the middle of the event. Once the lanes started to get choppy, and the righties started to get really deep into my lay down area, I had to put the Sinister away. The cover was just too strong for me to get it through the front without forcing it, which thus would give me bad angles. The Sinister is a ball that does seem to allow me to chase a pattern a little deeper than I usually would with other asymmetrical balls, but still is at its strength when I can keep it in front of me, and need a strong hard defined motion at the end of the pattern. I have also used the Sinister with 500 grit surface on the very long 52 foot PBA Badger pattern. It worked for a little bit, but lane shined a little quick, and exposed the pin distance of the layout as being a little too long for this pattern. I have also smoothed the cover down with Storm step #1, and used the Sinister on our league condition. It rolls well, and has a nice change of direction with this finish. Over all, I like the Sinister on medium heavy conditions when I need a strong change of direction down lane. The Sinister is a real good compliment to the Asylum. When the Asylum starts to bog down because there is too much oil, or carrydown, I can go to the Sinister and get that shape that I need to get the corner pins out. The cover on the Sinister has a lot of versatility as far as polishing or dulling the ball to dial in the reaction needed. Thank you for taking the time to read my review of the Sinister, and always remember to “Own It!”.

The new addition to the Roto Grip HP4 line is the Sinister. Sinister uses the Cage core with 76H Hybrid coverstock. I drilled mine 4.5 x 4 x 4 3/4 or 45 x 4 x 30. I compare the Sinster to the popular Defiant Soul, with more backend motion. But the Sinister is cleaner through the fronts than the Hyper cell. A good combination of both balls. I have used the Sinister with Storm step 2 for league with good success, just can only use it for about a game. I have applied surface to it bowl on Kegel sport conditions, which created a very strong ball motion even on the longer patterns. Straight players will like the control and hitting power, and the crankers will like it to be able to open up the lane with good continuation. Another great ball from Roto Grip. Right Hander PAP - 4 up 1 1/4 Rev rate - 400 Tilt - 15 Speed - 17

Hand: Left Ball Speed: 16-17mph Ball Weight: 15lbs PAP: 5 left 7/16 up Degrees of Tilt: 17 Layout: 3 x 6 1/8 x 2 3/8 The Roto Grip Sinister is drilled pin to the left side of ring finger and PSA (Preferred Spin Axis) directly under the thumb with 3000 abralon. The Sinister is by far the best heavy oil hybrid ball I have ever used. The Sinister is a great ball for when the hyper cell starts to lose it’s down lane motion and stay in the same spot with the Sinister and can get to the pocket with more back end. So far the best patterns for me is kegel route 66 and any pattern around 40-42 feet. I can stand around 17 with my feet and hit around 8-9 at the arrows and the ball makes a great mid lane read and makes a turn to the pocket with good angle but predictable. The Sinister reminds me of the original hyroad when my other balls for that particular pattern or situation don’t work too well I can always pull the hyroad out and just seems to work. That is the same thing with the Sinister on heavy oil. When my other high performance balls tend to lay off I can pull the Sinister out and gets down the lane easier and makes a turn or if it comes in a little light it mixes the pins up really good to get a strike or get a break for not getting a split. I have not had a whole lot of success with some high end hybrids but this one is reconsidering my thoughts on them and will stay in my bag as long as I can. If you have any questions about the Sinister email me at garrett.richardson@pinolebowlerssupply.com . I have a video of the Sinister on youtube! Garrett Richardson Storm/Roto Grip Pro Shop Staff Vise Inserts Amateur Staff Pinole Bowler’s Supply www.facebook.com/grstorm www.facebook.com/pinolebowlerssupply www.stormbowling.com www.rotogrip.com www.viseinserts.com

The Roto Grip Sinister has the strongest mid lane roll that I have ever seen or had in my bag. The sinister always reads the right part of the lane regardless of surface and condition. The trust that you must have in your equipment comes so fast with this ball. Once you see the ball go down the lane and see the motion and the traction that the ball has and still exits the pin deck by the 9 pin, you will not want to throw anything else. Currently, the sinister is my favorite ball in my bag, hands down.

The Sinister is one of the strongest ball in my bag right now, it is my go to ball on those heavier oil patterns when i need the ball to read the lanes a bit earlier and not miss the breakpoint, but it isn't just for those heavier volumes of oil. I can get this bag out on a THS and watch it glide across the whole lane and make a nice smooth backend transition. I drilled this ball up with a 30 x 5 x 70 layout. I did this to ensure the earlier roll but didn’t give it such a strong pin that it would burn up early on the lanes. This ball really complements my Storm Crux and Roto Grip Asylum. I can start off early with the Sinister, get that spot I want to be in and then move to the Crux and then to the Asylum without having to think too much about how far do I need to move. This piece plays really well with others, and is an easy choice for first out of the bag on those medium to heavier volumes of oil. Samuel Benifield BowlersMart Buford

Roto Grip Sinister Layout: 55 x 4 3/4 x 35 Box Finish Bowler Info: 325 Rev Rate Speed: 16 - 17 MPH The Sinister immediately made an impression on me when the first 2 games out of the box, in league, were 300 and 279 with this ball. What amazed me was the overall strength of this ball combined with the continuation and entry angle that it maintains through the pins. This is not the old-school heavy oil ball; this ball was designed to be used across a variety of conditions, but with a little bit of surface, it can handle the heaviest of heavy oil. Out of box, however, it is perfect for medium to heavier house shots, where you can give away the pocket but still expect a strong but controllable back end reaction. There is a noticeable roll that you will see with the core of this ball that is unique and exemplary, as the energy it maintains down lane is different than any ball I have seen in quite some time. When compared to a Roto Grip Outcry, the Sinister is approximately 5 to 6 boards stronger. Because of the dull box finish of the Outcry, they 2 balls are good compliments to each other, as you can easily adjust a couple boards to the right and change to the Outcry after the Sinister begins to hook too much, and maintain a similar ball reaction. Video: https://www.youtube.com/watch?v=E-lelJVjCAg&feature=youtu.be Mike LeViner Bowlers Mart

Introducing the latest top of the line ball from Roto Grip, the Sinister. This ball uses the 76H coverstock wrapped around the new Cage Core. This ball out of box comes at a 4000-grit abralon finish. With this finish, it still gives the ball push through the fronts without sacrificing a strong mid-lane recovery. I was shocked that this ball was able to retain so much energy being a asymmetrical ball. I drilled this ball with a 45° x 4 1/2? x 30°. I went with this layout to get the ball into the roll and still have an angular backend motion. The motion on this ball is the perfect complement to be between the Hyper Cell and Totally Defiant. At its out of box finish, you will see good push through the heads while still reading the mid part of the lane and still retaining energy as it hits the pins. I like this ball because normally for asymmetrical equipment they tend to die out when it hits the breakpoint, but this ball does the opposite packing a punch as it hits the breakpoint. For me, I could see this ball coming into play on medium to heavy oily lane conditions. It will be good on the fresh on your typical house shot. For sport shots, this ball works really well on short patterns and long patterns. If you don’t see enough movement and is passing the breakpoint, don’t be afraid to surface the Sinister to 2000, 1000, or even 500. Based off performance, I give this ball an “A-.” Based off looks, I give this ball an “A.” I like the colors on this ball. It looks like a wrecker with green added to it.

Roto Grip Sinister Right Handed Experience Advanced (I have bowled in a league and hold a PBA Card) League Average 220 Ball Speed Medium 15-16mph Style Cranker PAP 5 over 1/4" up PSA Layout - 4" x 4" x 2" Balance Hole - yes Surface Preparation - Out of Box (4000 Grit Abralon pad) What I Was Looking For from this ball: Something very strong and continuous when it makes it turn. Basically a heavy oil ball. What I Ended Up With in the Ball and Layout: Pretty much what I wanted with no disappointments. Strong and long with a continuous motion down the lane and through the pocket. I tested this ball on a fresh pattern at the local Center I manage and own my pro shop in located in Metropolis Illinois. I run a heavy oil pattern with tons of units in the middle and a gradual drop to the gutter. When I pulled this ball out, I simply stood left and threw right. I was guite amased at how the ball kept it downward lane motion and then erupted to the pocket with a surge of power. Needless to say I fell in love with this ball right away. I played around the 15 board for about 5 games and continued to swing to the ditch. The ball continued to hit hard and stay consistent. I did make slight left hand moves to compensate for the oil moving downward. The next games I moved even farther left than I normally do and continued to play a modified version of my original line hitting 20 out to about 5. I was impressed at how the ball continued to react the same way it did at first. After 10 games, I burned up my shot pretty easily. I noticed a normal amount of roll-out at this point and a flatter hit. I did change hand positions and stay around the same area with much more side roll and could get to the pocket but wasnt comfortable with this adjustment with this ball. Needless to say I struggled a bit with over under as expected after the lane dried out and this is what I expected so no disappointment at all. Overall: This is one awesome ball for oily lane conditions! Exactly what I expected and I am extremely impressed with it. I suggest this ball to anyone wanting a heavy oil ball or someone that doesnt have a strong hand and wants a strong ball reaction. I definately suggest only using this ball on heavy oil conditions and not trying overpower it on a dryer shot. It works fanstastic in oil period! Sean Baker Storm/Roto Grip Staff Bowl Like A Pro Shop 1107 E. 8th Street Metropolis IL 62960

Rotogrip has finally unveiled the Sinister. The Sinister is the most aggressive ball in the HP4 Line. The Sinister’s outer shell is the 76H Hybrid Reactive Cover. The inner component is the BRAND NEW Cage Core, It is Highly Aggressive and with an RG of 2.52 (15LBs) it’ll get down lane without problem. The Sinister’s out of box finish is 4000. If you need a little bit more pop down lane do not hesitate to bring it down to 3000 or even 1500. The flare on this ball is insane! 7+ Inches and the ball keeps going. If you need a ball that cuts through heavy oil without a problem or a ball with devastating hitting power then its time to get Sinister. I went with a standard pin down drilling. My pin is directly under my ring finger. CG Kicked out, with a weight hole in-between P2 and P3. 60º x 5 x 60º. I find this layout is very smooth and continuous on Asymmetric balls. I tend to start with the Sinister a bit inside around 12 and keep my break point around 7 or 8. As the lanes break down I can move in even deeper and keep the same breakpoint. The Sinister keeps the pins very low and gets a tremendous amount of angle. I would suggest this ball to anyone looking for Heavy hooking benchmark ball.

Roto Grip Sinister Ball Review by PJ Haggerty After throwing the Hyper Cell, our wonderful team and Roto Grip created a motion that is a perfect complement, while keeping a similar motion. If you loved the Hyper Cell, you will love the Sinster as well. I can honestly say, the motions are very similar between the Hyper Cell and Sinister are the same. They are both forward, heavy rolling motions that are very versatile on many types of conditions. I’d say the real difference with the Sinister is the down lane motion. It provides more pop while still reading the body of the lane. I’ve drilled two of them so far. The first one is a high pin above my ring finger with the mass bias just above my thumb. For me, this comes out to 5.5 x 5 x 95. I polished this one and am able to use it when some oil gets down lane and some of the symmetrical balls don’t go through the pins the right way. Also, when some symmetrical balls are too quick off the spot, the Sinister keeps a slower response time with still a clean and angular motion. The 2nd one I drilled is a lower pin under my middle finger with a bigger shift. This maps out to be 6 x 4 x 25 and it’s a much stronger and forward motion. This slows the response time down a lot and still provides a great motion. The Sinister takes surface well too. Even though it is in the HP-4 line, the cover is still clean enough to scuff up and dig into without using too much energy. I can see the high rev guys using this to cover a lot of boards and the straighter guys using it as their new piece for the league season. Go drill one and #OwnIt!!

Layout is pin in the palm weight hole down. I am a left handed tweener with a 325 rev rate. I am usually not a big fan of asymmetric core ball motion, but I have to make an exception for the Sinister. If I didn’t know it was an asymmetric ball, I would have thought it was a symmetric ball. I recently used this ball in a tournament where they decided to put out a ton of units out, so I had to close up my angles and use the strongest ball I had i.e. Sinister. I didn’t leave any flat 7 pins, which I am rev impaired and that never happens on higher volume patterns for me. This is a great ball that would fit in any arsenal out there, especially tournament players. Jeff Mersch Roto Grip Amateur Staff

Weight: 14 lbs. Pin Length: 4” Drilling: 35 X 4 X 20, pin up PAP: 3 1/8 & 1/4 up Pattern Length: 39 ft. Pattern Volume: Medium Pattern Type: THS Right handed The SINISTER has a 76H Hybrid Reactive Coverstock, with an asymmetrical Cage Core Weight Block. Factory finish is 4000 grit Abralon. The SINISTER is in the HP4 hook potential line, has a 7” flare potential, and is yellow/pearl/navy in color. I used the SINISTER on our 39 ft. house pattern at box finish (4000 grit), but I added some polish to get some extra length. The SINISTER, at box finish, hooked a bit too early for me on our house pattern. With the added polish, I got the extra length I was looking for and a great read coming off the pattern. SINISTER made a strong turn to the pocket and continued right on through the pins. This ball will be a hook monster with the proper surface changes. I found that even with the polish, by the end of the 2nd game, the SINISTER was a little too much ball for the house pattern. I put the SINISTER away, and switched to the HYSTERIA, and I was able to move back out a couple boards and finish out the set strong. I think this will be a great piece for heavier oil shots at it’s 4000 grit box finish. It is versatile enough, that with a little polish, it looks great on medium oil house shot patterns as well. Carol Teel Roto Grip Amateur Staff Member

The Sinister is a hook machine! If you’re looking for an aggressive asymmetrical with a lot of backend, then the Sinister is your ball! I put the pin down on this ball with a weight hole. It gets through the fronts well enough because of the mid RG core (2.52) but still revs up strong and makes a hard turn left. Some Asymmetricals tend to roll too early and lose energy, but not the Sinister. It retains energy and makes a very strong motion and still continues strong through the pins. Definitely one of my new favorite heavy oil balls!

Sinister - 60 x 4 x40 pin thru ring finger - out of the box Oil patterns: 42ft Kegel Flex with Fire and Ice oil and 43ft PBA regional pattern Lane surface: HPL installed 10 years ago and rescreened in 2014 On the house pattern, the ball was a little too strong in the middle of the lane when standing 22 and looking at 6-8... Moved into 29 and looked at 12-14 and the ball held better and was really strong thru the pin deck. I was really thinking that with the strong layout in this ball, it would burned up before it got to the pocket, but it did not one bit. I put the Sinister on the Innovative ball spinner and hit it with 4000ab and polished it and it gave me that additional length i was looking for when playing the lighter oil part of both patterns. On the 43ft pattern with the out of the box finish, it was just too strong to play the "playable" outside part of the pattern, BUT once polished, the Sinister was the complete package, on the fresh and also while I and another left hander beat the pattern up, I just move a little bit after a couple of frames and continued to tuck in a little to stay in the playable area.

The Roto Grip Sinister is a great addition to the HP4 lineup! The Hybrid cover and the new Cage Core provides a distinct bowling ball reaction. The colors (Neon Yellow & White Pearl with Navy Solid) livens up the shelf while the Sinister’s ball motion will open up the lane and provide devastating motion through the pins! The layout that I used for the Sinister is from the Storm VLS System which is Pin to PAP 3 ½, PSA to PAP 6 ¼ and Pin Buffer is 2 ½ or roughly for the dual angle people 70 X 3 ½ X approx. 45. It is a strong pin layout with pin right of the Ring Finger and the Mass is below my Thumb and the weight hole is on my P3. My coordinates are: PAP 5 5/8 over and ¾ up, around 300 rev rate, Ball speed around 15mph, more up the ball release and I am right handed. I compared the Sinister to the Hyper Cell and the Totally Defiant on various patterns. What I noticed is simple the Sinister is cleaner through the front part of the lane than a Hyper Cell with more backend motion. The Totally Defiant is cleaner than the Sinister and backend motion is very similar. The Sinister’s ball motion is very similar to the Defiant Soul but STRONGER throughout the lane. The Sinister is a strong ball that is versatile. The Hyper Cell has a distinct ball motion that can be tweaked…. But the tendency is to start up early and have a very smooth backend motion. The Sinister also has a distinct ball motion but because of the Hybrid cover and Cage core it stores more energy and has a strong backend motion. For the weaker players moving left with a Hyper Cell and going “around the pattern” was not really an option but with the Sinister it is a very good option! I was able to use the Sinister on a house pattern and continued moving left and Sinister was still motoring through the pin deck! The other ball that I was comparing to the Sinister was the Totally Defiant. The Totally Defiant is cleaner and a tad more responsive at the break point when there is a defined dry area to throw to. The Sinister starts up a little sooner and is stronger in the mid lane than the Totally Defiant. When the House pattern starts to break down and the Sinister is forcing you out of your comfort zone than switch to the Totally Defiant. The Sinister and Totally Defiant are a good one two punch on the medium house patterns and Sport patterns. The Sinister is a perfect blend of strength and finesse!!!! Dan Schaden Jr Storm/ RotoGrip Staff Member Vise Grip Staff Member

Layout : 45x5.5x45 Rev Rate : 450-500 Ball Speed : 17-18 First off I would like to say that the Sinister is one of the best looking bowling balls I have ever seen. The Neon Yellow and White Pearl with the Navy make this a definite looker. I cannot wait to get these on the wall in the Pro Shop !!! I am absolutely in love with this ball motion I get with the Sinister . I really liked the Hyper Cell on heavier conditions but when the pattern started to go away the Hyper Cell need to go back in the bag immediately . I find the Sinister a lot more playable on a wider variety of conditions ranging from heavy to medium. I really like to throw the ball hard and the Sinister allows to me to do just that even on heavier conditions which really gives me confidence when throwing this ball. But even on medium conditions I can still move left and not lose any of that great backend motion that allows for optimal pin carry. I feel we matched the core and cover up perfectly on this ball to appeal to a wider variety of bowlers from lower rev rate and ball speed to higher ball speed and higher rev rate players and everyone in between. The Sinister is a great addition to my arsenal and I look forward to adding it to some of my customers arsenals as well . Kudos to Chris Schlemer and everyone at Roto Grip for adding another great product to our already great lineup ! I seen us retaining our " Ball of the Year" Award !!!! #ownit