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:True Motion
Reviewed:December 2017
Coverstock Specs
Name:True Urethane
Type:Urethane Solid
Box Finish:500 / 1000 SiaAir
Color:Black Solid
Core Specs
Name:Magnitude 035 Low Diff Symmetric
Int. Diff:0.000

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

The True Motion brings a true urethane coverstock to the Brunswick line for the first time since the Karma Urethane. Its True Urethane cover surrounds the symmetrical core design that was used previously in the Magnitude 035. This lower differential core will produce between three and four inches of tightly-spaced track flare lines for most bowlers. The rough 500/1000 SiaAir box finish keeps the True Motion’s urethane cover from sliding too far before grabbing the lane.

The True Motion was best for playing straighter up the lane on our dry oil test pattern. All three of our testers kept their shammy pads close by to wipe down the oil after each shot to help maintain consistent ball motion. Cranker had the best reaction, as he could play a little more angle through the front than the other two testers. He was starting his ball on the 18 board, crossing near the second arrow, and getting it out to the five board at a breakpoint much closer to the foul line than what is typically seen with reactive resin bowling balls. Tweener was farther right with his feet, setting his ball down on fifteen, crossing 12 at the arrows, and only getting out to seven at the breakpoint. If he got his ball farther outside than that, he didn’t have enough hook

Additional Brunswick True Motion 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.