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:Black Widow Urethane
Reviewed:December 2017
Coverstock Specs
Type:Urethane Solid
Box Finish:360 / 500 / 500 Abralon
Core Specs
Name:Gas Mask
Int. Diff:0.016

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

The Black Widow Urethane combines a solid urethane coverstock with what is arguably the most popular core design ever from Hammer. The high-flaring Gas Mask core is unchanged from the other Widow line releases, with an RG of 2.50″, a total differential of 0.058″, and an intermediate differential of 0.016″. The dull urethane cover on this ball is earlier and smoother than the React-a-Thane cover from the Burgundy Hammer from several years back, but the added flare gave us more motion at the breakpoint than the Performance Urethane cover that was used on the Blue Hammer. The sanded 500 Abralon box finish makes sure this ball creates traction early on the lane so it doesn’t skip past the breakpoint.

With the friction created from its rough cover and the flare provided by its strong asymmetrical core, our testers had the most success with the Black Widow Urethane on our medium oil test pattern. Cranker had the best reaction on the fresh and his reaction got even better as the lane saw more traffic. The rough cover bit the lane early, providing a massive roll in the front and middle of the lane. This

Additional Hammer Black Widow Urethane Resources

Click here to visit Hammer'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.