Web M.B.

Revered by Hammer Fans.


The Web M.B. (Mass Bias) booms on the backend, its shiny finish and easy length create a perfect match with the Black Widow 2.0. The cover is a familiar and popular Semtex base, found on previous Black Widow balls, and is enhanced with new additives for ideal performance on medium oil.


The Web M.B. incorporates an elongated version of the Spheroid Core shape, creating asymmetry and more ball reaction shapes for the Web and Hammer lovers.


  • PART NUMBER 60-106428-93X
  • COLOR Dark Blue / Purple
  • CORE Spheroid Asymmetrical
  • CORE TYPE Asymmetric
  • COVERSTOCK Semtex NE Pearl
  • COVER TYPE Pearl Reactive
  • FINISH 500, 1000 Siaair / Crown Factory Compound
  • WEIGHTS 16-12 Pounds
  • LANE CONDITION Medium oil
  • REACTION Skid / Flip
  • WARRANTY Two years from purchase date
  • RELEASE DATE November 19, 2020


  • 16 lb - RG (2.490) DIFF (0.042) ASY (0.017)
  • 15 lb - RG (2.480) DIFF (0.048) ASY (0.018)
  • 14 lb - RG (2.520) DIFF (0.047) ASY (0.018)
  • 13 lb - RG (2.589) DIFF (0.043) ASY (0.011)
  • 12 lb - RG (2.612) DIFF (0.043) ASY (0.011)


Info Sheet
Ball Talker
Flip Card

Web MB Bowling Ball in Purple and Blue
Web M.B. 16 to 14 pound Core Image
Web M.B. 13 to 12 pound Core Image
Web M.B. Performance Badge - 25.75 total

Customer Reviews

Based on 38 reviews
C Miller
The WEB M.B.

The Web MB is a ball I found that gets down lane cleanly, while storing energy for that strong backend motion, and exceptional hitting power.

I see this ball in play on the medium length/volume oil patterns. Looks good on you normal house shots, too.

The MB is a great middle man for the Black Widow 2.0 and the Web Tour Hybrid. Needing to fill a 3 ball tote, this is it!

Scott Crawford
Excellent Benchmark Pearl

The Hammer Web M.B. is an excellent benchmark pearl. Mine is drilled 55 x 3.75 x 20 which has pretty good length but still reads the mid-lane some and has good backend reaction and continuation through the pins, but it’s not real flippy. Very controllable and reliable reaction. The hit and carry is big and this will be the first ball out of my bag often on house shots and medium to slightly oily patterns and allows me to play comfortably in the track area and stick with this ball even as I go left a good bit too before going to something more skid / flip. The Web series is great and this is an excellent asymmetric addition. Couple 300's with it already :)

Spencer Workman
641 Series

I recently got back into bowling and purchased this ball to use in tandem with my Black Widow 2.0. My third week back in leagues I rolled a 223, 214, 204 for a 641 series. This ball gives me versatility from multiple angles and provides me with a ball I am confident in every throw.

Michael Romero

The Hammer Web MB is a perfect transition ball for when a solid or hybrid is reacting a bit too early. The ball is nice when you need a ball to get through the fronts and midlane and still need a strong backend reaction. I drilled mine 55 x 4 1/2 x 35 and I was able to give myself some versatility with the ball by providing a small hand surface (2000). This is a great tournament ball to have in your bag/arsenal.

Godfrey Wilson III
Best Choice If Skid/Flip Is What You Need

This ball contains one of my favorite cores, that’s been given a little twist. The Semtex NE Pearl cover makes it a bit more angular than it’s predecessors. Impressively strong backend movement for a mid performance ball. If skid/flip is your game, or what you’ve been looking for is control over the heads, but a big move on the backend, or you typically see patterns that have your ball laboring to get to the pocket... the Web M.B. is a great choice.