Bowler Ratings

PatternStTwCr
Oily:X.XX.XX.X
Medium:X.XX.XX.X
Dry:X.XX.XX.X
Sport:X.XX.XX.X

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

Note: Ratings are only available to our subscribers.

General Info

Coverstock Specs
Name:Relativity Hybrid Reactive
Type:Reactive Hybrid
Box Finish:500 / 2000 / 4000 SiaAir
Color:Red / Silver / Blue
Empty
Core Specs
Name:Modified Mastermind Asymmetric
Type:Asymmetrical
RG:2.504
Diff:0.048
Int. Diff:0.013

The fifth release in Brunswick’s Mastermind series is the Mastermind Einstein. It uses a new modified weight block and a new hybrid coverstock. The new core is similar in shape to the one used in the previous Masterminds, but it has a slightly higher RG and slightly lower differentials.  The last time a ball in this line had a hybrid cover was the Mastermind Genius from early 2014. In sticking with the Einstein theme, this ball’s new cover is called Relativity Hybrid Reactive. We felt that it gave us more traction in the oil, which helped to smooth out the overall reaction shape a bit for our testers.

The predictable motion of the Einstein was best for us on our medium test pattern. It wants to pick up strong

The fifth release in Brunswick’s Mastermind series is the Mastermind Einstein. It uses a new modified weight block and a new hybrid coverstock. The new core is similar in shape to the one used in the previous Masterminds, but it has a slightly higher RG and slightly lower differentials.  The last time a ball in this line had a hybrid cover was the Mastermind Genius from early 2014. In sticking with the Einstein theme, this ball’s new cover is called Relativity Hybrid Reactive. We felt that it gave us more traction in the oil, which helped to smooth out

Additional Brunswick Mastermind Einstein Resources

Click here to visit Brunswick'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 test results and that you may sometimes find discrepancies between our comments / 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.