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:January 2020
Coverstock Specs
Type:Reactive Solid
Box Finish:2000 Grit Pad
Color:Deep Purple / Baby Blue / Neon Green
Core Specs
Name:E.T. (Equalizer Technology)
Int. Diff:0.016

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

The Roto Grip UFO uses the newest and most aggressive version of the MicroTrax coverstock, finished at the factory with a 2000 grit surface. The new asymmetrical E.T. (Equalizer Technology) core has a higher RG, higher differential, and lower intermediate differential than the Centrum core from the Halo series. The changes inside and out to the UFO gave us more total traction with an earlier read and a smoother back end compared to the Halo.

The UFO created plenty of easy hook on everything we threw it on, which helped it match up best to our heavy oil test pattern. All three testers easily got to the pocket on the fresh, as the UFO had no trouble creating traction and revving up very strongly in the midlane. Everyone needed to move two boards inside with their feet with the UFO and keep their balls closer to the pocket downlane compared to where they played with the Halo. This ball’s smoother motion had no trouble handling the oil, and it didn’t need to get farther right to the friction downlane in order to get through the pins. The UFO allowed all three testers to chase the oil farther left as the pattern started to break down. As long as the ball stayed in the oil, it

Additional Roto Grip UFO 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.