Callaway Big Bertha B21 Driver Review

Callaway Big Bertha B21 Driver Review

By Paul Liberatore



Time to read 4 min

Every time I turn around, it seems like Callaway is coming out with a hot new driver. Most recently, I had the chance to hit the drivers in the Epic line. Let me tell you, these clubs are hot off the face. 

In response to our review of the newest Epic line of drivers, I received multiple requests to do some research on the Big Bertha B21 driver. While I had heard of this club, I didn’t know much about it. But I was curious to learn more. 

So, I took to the streets and dove in head first with the Big Bertha B21. Let’s take a closer look at the findings.

Key Features

AI Flash Face design promotes faster ball speeds across the face for more distance, even on mishits.

Internal draw bias promotes straighter shots for players that slice.

Jailbreak Technology and T2C Triaxial Carbon Crown allow for faster clubhead speed and increased forgiveness.

Design and Technology

Callaway continues to push the envelope when it comes to driver technology and design. I never thought I’d see the day when AI was used in the design process. But sure enough, that’s what Callaway is doing. With that said, there’s plenty more tech to talk about in the B21.

In order to create a higher launch with less spin, Callaway has moved the CG farther forward and lower in the head. In testing, this has indeed reduced spin and increased launch angle – the equation for long, straight drives.

Internal draw bias has added weight in the heel of the club which helps players square the face through impact for straighter shots. 

The face is somewhat revolutionary as well. AI designed Flash Face SS21 is designed to promote faster ball speeds across the face for more distance.

Callaway’s patented Jailbreak Technology employs two vertical bars behind the face that connect the crown and sole. The extra reinforcement increases stability at impact and also works to promote faster ball speeds.

The T2C Triaxial Carbon Crown is much lighter than in previous models. This has allowed weight to be redistributed to other areas of the club where it’s more efficient.


  • Built-in draw bias helps reduce slice curvature.
  • Plenty of adjustability options make driver customization and fitting easy.
  • Lightweight clubhead allows golfers to increase swing speed resulting in greater distance.


  • Draw bias is not of benefit for players that naturally draw the ball.
  • Lack of stock shaft options might be a deterrent for some players.
  • Shipping times have been unpredictable.

Our Experience

I haven’t had the chance to hit the Big Bertha B21 personally (I tend to draw the ball too much, so this club doesn’t fit my swing), but a number of our readers have. Across the board, their feedback has been resoundingly positive.

Specifically, they’ve noted much straighter, longer tee shots thanks to the inherent draw bias. They also tout the solid feel and sound at impact, even on mishits.

Frequently Asked Questions

What Are the Best Golf Balls to Use With the Big Bertha B-21 Driver for Optimal Performance?

For optimal performance with my Big Bertha B-21 driver, I recommend choosing golf balls that match my swing preferences and driver adjustments. Look for balls that complement my swing style for the best results.

Can the Weight and Flexibility of the Big Bertha B-21 Driver Be Adjusted to Suit Individual Swing Preferences?

Yes, the weight and flexibility of the Big Bertha B-21 driver can be adjusted to suit individual swing preferences. It offers various adjustability options for swing customization, allowing for personalized performance on the course.

Are There Any Specific Tips for Maximizing the Performance of the Big Bertha B-21 Driver for Senior Golfers?

Maximizing performance for senior golfers with the Big Bertha B-21 driver involves personalized adjustments for swing speed improvement. Incorporating specific training exercises tailored to the individual’s needs can help optimize the club’s capabilities.

How Does the Big Bertha B-21 Driver Compare to Previous Models in Terms of Forgiveness and Distance?

The Big Bertha B-21 driver provides impressive forgiveness compared to previous models, promoting straighter shots even on off-center hits. Plus, it delivers noticeable distance improvement, thanks to advanced technology like the A.I. designed Flash Face and internal draw bias weighting.

Are There Any Recommended Training Exercises or Drills to Improve Swing Speed and Maximize the Benefits of the Big Bertha B-21 Driver?

I’ve found that incorporating swing speed exercises and driver performance drills into my practice routine has significantly improved my distance and accuracy with the Big Bertha B-21 driver. My swing feels more powerful and consistent.


Callaway doesn’t produce drivers that are subpar, period. The thought, innovation, and technology that go into every one of their clubs are the best of the best. 

That’s certainly the case with the Big Bertha B21. The company was readily aware that most amateurs struggle with a slice, and knew they could offer a club to help counter the dreaded miss, while optimizing performance for more distance. 

If you’re looking to get more distance out of your drives and find more fairways, you need to give the Callaway Big Bertha B21 a shot.

Paul Liberatore

Paul Liberatore

As the Founder of Golfers Authority Paul Liberatore Esq. has spent the last 7+ years writing about the best golf equipment or instruction from the top golf instructors in the world. He has been a contributing writer for Sports Illustrated Golf and GolfWRX. After graduating with honors from Purdue University, he realized that he had a passion for the golf business and the law. When he's not practicing law, or creating golf content on YouTube, he can be found on his syndicated Behind the Golf Brand podcast talking with the most prolific leaders in the golf industry. 

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