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Author Topic: RST X-1  (Read 7485 times)


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« on: November 20, 2020, 11:56:23 AM »
The X-1 is the newest addition to the HP4 line. It features the MicroTrax Hybrid coverstock. This ball doesn't do anything flashy; it simply gets the job done. In the past, Roto Grip has been known to make some of the best Asymmetrical balls in the industry. The X-1 proudly carries that torch. I found the X-1 to be similar in overall strength compared to the UFO and the X-1 is about a zone stronger than the Nuclear Cell. The UFO and X-1 differ because they read the lane at different points. The UFO will be slightly earlier because of the Solid MicroTrax cover whereas the X-1 will be slightly cleaner and retain more shape downlane because it has the Hybrid Cover. In all, you'll be able to throw the X-1 on heavy conditions when you need slightly more length than the UFO is giving you.



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Re: RST X-1
« Reply #16 on: December 30, 2020, 06:35:09 AM »
The RST X1 features the MicroTrax™ Hybrid cover along with the all new RST™ core (RG=2.53, Diff=.053 int diff=.016).

I drilled my X1 5x4x3 because I wanted to be able to use it when the front part of the lanes were hooking a bit but they weren’t quite ready for a skid snap shape yet. For me the X1 fits this spot perfectly! When balls like the UFO or Proton Physix ready too quickly, the X1 rolls great. What I really love about the X1 is the float through the front without sacrificing the quick revving asymmetrical shape that I love.

If you are looking for a ball for medium to heavy oil but don’t want something that hooks in our backswing, the RST X1 is it!


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Re: RST X-1
« Reply #17 on: December 30, 2020, 10:05:48 AM »
Layout 45 x 5 x 40. I left this one box finish which is 3000 abr and have been touching this up with the 3000 pad.

My intent was to drill this and see what it looked like before adding a 2nd or 3rd one to the bag. So far it has been hard to describe where it fits and not in a bad way. It is not a PROTON PHYSIX, but is has more motion than my RUBICON. It is very readable and predictable and I have been using it on mostly medium/long-long patterns in the 40-44 foot range. If I am on the slicker side of the spectrum, I touch it with the 3000 pad and close my angles down. It also works for me when I need to open up my angles slightly more. If I have to really open them up, then I work in my NUCLEAR CELL and ball down from that to a AXIOM PEARL.

The RST X-1 looks like a great shape that anyone who isn't afraid to drill a 2nd or 3rd companion ball would want to do it with this release. The cover looks like it might be more on the solid side vs pearl and that may be what is dictating the motion which is a strong arc type reaction without over snap.
« Last Edit: December 30, 2020, 10:07:29 AM by Bigmike »
"Tell me Cup, how does a great ball striker like you shoot an 83? Well I lipped out this putt on 18......"

Mike Craig - Storm Bowling Amateur Staff - Westerville, OH


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Re: RST X-1
« Reply #18 on: January 04, 2021, 06:06:05 PM »
The RST X-1 features the new Roto Star Core wrapped in MicroTrax Hybrid. For me, I am able to use this ball on a variety of patterns. I am able to use this in league and not have to worry about what it will do. It is a great benchmark shape for an asymmetrical ball. I can see myself bringing this ball everywhere I go whether that be tournaments or league. I also see this ball as a stronger and more versatile PhysiX. If you liked that ball you will not be disappointed with the RST X-1!!


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Re: RST X-1
« Reply #19 on: January 06, 2021, 09:39:01 AM »
PAP 5 7/8 over and 3/8 up
Layout 5x4x1.5

Did not really know what to expect from the X1 when I ordered it. I had heard Schlem talk about the ball and the intent to create more core torque with the design. But man, I was super impressed with what I saw.  Typically, stronger asymmetrical pieces tend to roll out for me with my slower ball speed and ball roll. The X1 is quite different.
Where the stronger balls tend to get forward for me off the spot the X1 ball roll is very continuous and shows no signs of rolling out for me. The ball takes to different lines and hand positions very well. I can see all different styles of bowlers having success with this piece if you have some oil up front. It is possible that shining the ball would allow for use on some lighter patterns. However, I’ve made no surface adjustments as the ball fits exactly where I wanted it to.
I would highly recommend this ball.


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Re: RST X-1
« Reply #20 on: January 19, 2021, 12:02:27 PM »
RST X-1 Powerfully Strong and Predictable

The Roto Grip RST X-1 is very strong HP4 ball. I drilled it with a favorite layout of mine 5.5x4x2  It reads the lane very well and just continues on the backend.  No quit in this ball.  You better have oil if you keep the 3000 grit factory finish.  I personally shined mine for the house shot and it is my go to ball from the start.  This ball is so good, it stores so much energy and drives through the pin, strong controllable finish on the backend Hitting Power is as great as every Roto Grip Ball I’ve thrown. I can play pretty much any line left of 3rd arrow and the ball will recover from anywhere. My PAP is 5-1/8 and 1/8 up. Usually around 15-16mph, I’d probably be classified between a tweener and a cranker.
See my ball review video on YouTube here:


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Re: RST X-1
« Reply #21 on: January 26, 2021, 03:58:19 PM »
PAP 4 ½ over and 1 up ball speed 15 rev rate 275
Drilling-75x5 ½x25
So at first I didn't think I was going to drill this one, with all the asymmetrical releases and friction I bowl on, I just kinda overlooked it. Then, after drilling a couple for my customers I was intrigued and decided to go with a recommendation from my husband. I see a unique motion we haven't seen much lately, the RST-X1 is strong but not like other balls. Usually when a strong ball comes out we see a lot of hook up front which on high friction surfaces can be just to much and calls for a weaker ball to see the lanes the right way. But, with this gem, you don't have to worry about this, if you have a slower ball speed and have trouble using stronger stuff. Go out and get the RST-x1 you will not be disappointed!!


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Re: RST X-1
« Reply #22 on: January 26, 2021, 04:10:22 PM »
PAP 3 ¾ over 1” up ball speed 17 rev rate 475
Drilling-45x5 1/2x35
Immediately after throwing I knew this ball and I were going to be friends, right off my hand I see complete control and predictability. We don't see a lot of big cores that bring both strength and predictability, this one takes the cake for me. I can play left in the oil or move right and keep it in front of me around the track. I never feel like I'm lost with this one in my hands. Will for sure be going with me to all tournaments, 100% my arsenal building piece.


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Re: RST X-1
« Reply #23 on: February 02, 2021, 09:25:52 AM »
Ball Review RST-X1
Cover: New MicroTrax
Hybrid Cover Stock
3000 unpolished

RG: 2.53
PSA: 0.016

What can I say but WOW! Asymmetrical balls and I have a hard time matching up, but I can stay this one is a winner for me. I drilled this OOB 45 x 3 ½ x 40. I left the cover OOB. The RST is smooth through the front for me and reads the mid lane very well and is continuous with a strong backend. I have a hard time getting Asymmetrical to get through the pins without burning up and getting the right shape. I have experimented with different layouts on several balls. This one is dead on. I shot 723 with my first series right out of the box. I found that I can move and trust the ball will turn the corner which is very difficulty for me since I am a speed dominant lower rev player. I can see myself using this right out to the bag on the fresh. This ball has a lot of versatility another home run for Roto Grip!!


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Re: RST X-1 review by Lonnie Pemberton
« Reply #24 on: February 04, 2021, 12:06:26 AM »
Cover: MicroTrax (Micro Nanoparticle Traction) Hybrid
Core: Roto Star Tour Core (RST™ Core)
Finish: 3000
RG: 2.53
Differential: 0.053

Right-Handed Tweener
Speed: 12-13 mph
Rev Rate: 315
PAP: 4 7/8 Right 3/8 Up

Ball Layout: Pin over bridge/ring 55 X 5 1/4 X 35

The New RST X-1 is a throw back motion ball updated for todays conditions. Compared to other HP4 releases it is cleaner than the solid versions you've seen released in recent years. Compared to the Pearl HP 4 line balls it is much smoother. Compared to the other hybrid releases, it is both. It's a ball that accentuates the best characteristics of strong balls with Hybrid covers. It's mid-lane read is great, down-lane motions super predictable, and is incredibly continuous without a drastic change of direction.

My favorite thing about the RST-X1 is how many different conditions it is useful on. Even the extreme ends of the spectrum are in play. The RST X-1 is smooth enough that with hand positions you can control downlane reaction on both short and long oil. In league it has been exceptional for me on conditions that are a little more blended. The adaptability of this ball to every condition makes it a good match up for most everyone.