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:Quantum Bias
Reviewed:August 2018
Coverstock Specs
Type:Reactive Solid
Box Finish:500 / 1000 SiaAir
Color:White Solid
Core Specs
Name:Quantum Mushroom High RG Asymmetric
Int. Diff:0.013

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

The Quantum Bias is the fourth entry into the revived Quantum line for Brunswick. This solid white ball features the new Quantum Mushroom High RG Asymmetric core shape, making it the first of the four new Quantums to feature an asymmetrical weight block. The coverstock on this ball is ECA-XR, which is a reactive solid formulation that comes out of the box sanded at 500/1000 SiaAir. The Quantum Bias topped the hook scale for Brunswick balls for our testers, making it a no-brainer on heavy volume lane conditions.

All three of our testers loved the amount of easy hook they saw from the Quantum Bias on our heavy oil test pattern. Its 1000 grit sanded ECA-XR coverstock easily tore through the heaviest part of this pattern with no effort. This new cover gave us the most hook we have seen from a Brunswick ball on this pattern. Stroker played all the way in on board 18 off his hand with the Bias. He was targeting the 13 board at the arrows and using a breakpoint on nine downlane. Tweener started his ball on board 24, crossed just outside the middle arrow, and also got his ball out to nine at the breakpoint. Cranker’s ball was landing on 32, crossing the fifth arrow, and also sharing nine with the other two testers downlane.

Brunswick Quantum Bias Comparisons

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

To compare the Brunswick Quantum Bias to any other bowling ball(s), please use our Bowling Ball Comparison tool.

Additional Brunswick Quantum Bias 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 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.