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

Name:Guru Master
Reviewed:July 2015
Coverstock Specs
Type:Reactive Solid
Box Finish:500 / 1500 SiaAir
Color:Black / Orange Solid
Core Specs
Int. Diff:0.018

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

The Guru Master is the latest high performance hook-in-a-box release from Radical. It joins the original Guru and the Guru Mighty at this price point and it provides more total hook than either of these previous versions. This ball features a strong solid reactive coverstock wrapped around the same asymmetrical finger scoop / offset core design that was used in the previous Gurus. The Master’s cover comes out of the box finished with a 1500 SiaAir pad, helping it to create traction on the slickest oil patterns. Rev-challenged and speed-dominant bowlers will love the large amount of total hook they will see from this release.

Without question, we had our best reaction on our heavy oil test pattern. This ball creates so much hook so early that it needs a higher volume of oil concentrated in the front of the lane to be at its best. Stroker could stand farther left than he ever could on this pattern without having

Additional Radical Guru Master Resources

Click here to visit Radical'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.