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What should I know about the Roto Grip Gem?
  • Brilliant. Extraordinary. Magnificent.
  • Breathtaking looks and performance!
  • Dazzles on heavy oil
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Roto Grip Gem

The look and performance of this high-performance bowling ball make it nothing less than a Gem. The Roto Grip Gem introduces us to the Defiant LRG core which is the lowest RG asymmetrical core in the current Roto Grip line-up. This core enables the ball to rev up fast and continue strong! Not only is the core in this ball noteworthy but the coverstock is the extremely aggressive MicroTrax Solid Reactive. This powerful combination makes this bowling ball perfect for heavy oil conditions.

  • Color: Citrine/Ruby/Amethyst
    All colors do vary somewhat from the picture shown
  • Coverstock: MicroTrax Solid Reactive
  • Core: Defiant LRG (14-16#)
  • Finish: 2000 Abralon
  • RG: 2.47 (for 15# ball)
  • Differential: 0.053 (for 15# ball)
  • Recommended Lane Condition: Heavy Oil
  • Hook Potential: High
  • Length: Middle
  • A few tiny pit holes in the cover stock of the ball are normal
  • SKU: RGBBMRGM
  • Product ID: 13662
  • Brand: Roto Grip
  • Category: Bowling Balls
  • Ball Performance: High-Performance Balls
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Customer Reviews | 11 Customer Questions

Avg Customer Rating
5 Stars based on 2 Reviews
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3/28/2022
By Jackson from Lewiston
5/5 Stars
Pros:

This ball is awesome

Best Uses:

Heavy oil

Bottom Line:

Yes, I would recommend this to a friend

Best ball

This is the best bowling ball that I ever thrown so far

3/16/2022
By Jeff from Pennsylvania
5/5 Stars
Bottom Line:

Yes, I would recommend this to a friend

Wow

Wow. I picked my Gem up last night and Roto Grip nailed it. I am admittedly a Roto Grip fan but this ball does things that nothing else in my bag can do. Easily the strongest ball I have ever rolled. Looking forward to it's debut on league night.

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Customer Questions & Answers | Reviews

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Question:


Would this ball be good for high rev players? I like too buy weaker balls because of my high rev rate.

2/1/2022 - By

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Answer:


This ball would be good for someone with a high ball speed but if you have a high rev rate this ball is already designed to have a high hook potential so you may only be able to use this in the highest oil conditions.

2/2/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


I have the zenith. How would this compare. As well as being a low speed bowler?

2/19/2022 - By

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Answer:


This ball would be most similar to the Zenith Solid. I am not sure which Zenith you have but this has a duller finish and solid cover to help it react earlier on the lanes. If you have a slower ball speed you may prefer a ball that gives you more length.

3/4/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


What is the difference between the gem and the nova

2/20/2022 - By

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Answer:


The Roto Grip Gem is going to read a little earlier on the lane and because of this it will also have a slightly higher overall hook potential.

2/25/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


angular or arcing

2/27/2022 - By

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Answer:


This ball will have more of an arcing hook.

3/4/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


How does this ball do in medium to light oil

3/3/2022 - By

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Answer:


This ball would be too strong to use on medium to lighter oil. It would react too strong too early and not continue down the lane.

3/4/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


Could you put a little polish on it to longer

3/9/2022 - By

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Answer:


Yes, adding polish would make this ball react later on the lanes and give it a sharper backend hook.

3/11/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


Does the 13# ball has the same core as the 14-15# balls have?

3/20/2022 - By

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Answer:


The 13lb ball has a different weight block. Here is a link to view the differences on RotoGrips website: https://www.stormbowling.com/gem-bbmrgm12

3/25/2022 - By Bowling.Com Staff
7 of 8 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


What is difference between the gem and nova

5/10/2022 - By

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Question:


I’m a lefty, i role a fast straight ball.Will this ball help me get to the pocket once I place on my mark

5/12/2022 - By

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Answer:


If you are speed dominant then this could be a good option for you as the ball is designed to start reading earlier on the lane for a smoother arcing hook. If you do not have a high rev rate then this ball could work for you on medium to heavy oil and being that you are left handed the left side of the lanes tends to hold oil longer because less bowlers are left handed and it will not dry out as quickly because there is less traffic on that side of the lane.

5/12/2022 - By Bowling.Com Staff
0 of 0 customers found this answer helpful. Did you find this answer helpful? Yes | No Thanks for your feedback!

Question:


I am looking for a replacement ball is a slightly lighter weight for my original Hyper Cell. How does this ball compare to the Hyper Cell? Similar specs?

5/15/2022 - By

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Question:


Hi have a lot of ball speed not a whole lot of revs woukd this ball be good for me

5/17/2022 - By

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