Bowler Ratings


Bowler ratings are from 1 to 10 in order of Stroker (ST), Tweener (TW), Cranker (CR)

Note: Ratings are only available to our premium members.

General Info

Reviewed:June 2024
Coverstock Specs
Name:eTrax ULTRA Solid Reactive
Type:Reactive Solid
Box Finish:2000 Abralon
Color:Turquoise / Navy / Black
Core Specs
Name:Nucleus + AI
Int. Diff:0.019

For details on our standard test layouts, please click here.

The Roto Grip X-Cell brings back the fan-favorite Nucleus core design from the original Cell with an upgrade to the AI outer core system. The result is a slightly lower RG of 2.50″, a total differential of 0.056″, and an intermediate differential of 0.019″. The coverstock has also been upgraded from the original Cell’s Cytoplasmic Solid to eTrax ULTRA Solid in order to match up better to today’s oils. The new coverstock comes out of the box sanded with 2000 Abralon. We found the X-Cell to easily handle heavy volumes of oil while still providing a strong back end motion with lots of continuation.


The X-Cell’s strong overall motion allowed Cranker to demolish our heavy oil test pattern. The ball easily dug into the oil, giving him tons of recovery on this slick condition. He could be aggressive with both his speed and his release without the ball over-hooking at the end of the pattern. As good as the ball was on the fresh, he was worried about it burning up as the pattern broke down. This worry was short-lived, though, as he had no trouble getting his ball to continue to split the 8 and 9 pins as he got deeper with his laydown point in transition. The box finish easily chewed through the oil in middle of the lane, providing tons of continuation and lots of hitting power. He preferred the motion and shape this ball provided over the Magic Gem on this condition, even though it covered fewer boards. The way the X-Cell went down the lane later in the session was also very impressive. Cranker didn’t change the surface at all on this condition, as he was able to simply move his laydown point farther left to find more oil in the front to keep

Roto Grip X-Cell Comparisons

Click below to see a comparison table of each pair of bowling balls shown:

To compare the Roto Grip X-Cell to any other bowling ball(s), please use our Bowling Ball Comparison tool.

Additional Roto Grip X-Cell Resources

Click here to visit Roto Grip's website to read the manufacturer-supplied information on this ball. Also, see below for the manufacturer-produced promotional video for this ball.

Please remember that our reviews are solely based on our own testing and that you may sometimes find differences between our comments and ratings and the manufacturer's claims. Links to these manufacturer resources are provided here strictly for convenience purposes.

The BTM Ball Testing Team

About The BTM Ball Testing Team

The BTM Ball Testing Team is led by Eric Martinez. Our team of three testers has thrown and reviewed hundreds of bowling balls for Bowling This Month. When not testing balls for BTM, Eric owns and operates University Pro Shop in San Antonio, TX and he is an avid competitive bowler. Click here to learn more about how we test and review bowling balls.