Variant
OS Standard

Driver

Used Callaway Big Bertha Reva 21 OS Driver

2021

The OS (Oversized) variant boasts a larger clubhead profile, pushing weight to the perimeter for unparalleled forgiveness. This design minimizes twisting on mishits, ensuring maximum stability and straighter shots, perfect for golfers needing ultimate accuracy and confidence.

Release timeline

Oldest → newest

  1. 1991
    Big Bertha Original
  2. 1996
    Big Bertha 1996
  3. 1997
    Biggest Big Bertha
  4. 2004
    Big Bertha 2004
  5. 2006
    Big Bertha 2006
  6. 2007
    Big Bertha 2007
  7. 2008
    Big Bertha 2008
  8. 2009
    Big Bertha Diablo
  9. 2014
    Big Bertha V Series Big Bertha Alpha Big Bertha 2014
  10. 2015
    Big Bertha Alpha 815 Big Bertha 2015
  11. 2016
    Big Bertha Mini 1.5 Big Bertha Fusion Big Bertha Alpha 816
  12. 2017
    Big Bertha OS 2017 Big Bertha Fusion 2017
  13. 2019
    Big Bertha 2019
  14. 2021
    Big Bertha Reva 21 Big Bertha B21
  15. 2023
    Big Bertha Reva 2023 Big Bertha 2023

The Callaway Big Bertha Reva 21 OS doesn't include any drivers.

View Callaway Big Bertha Reva 21 drivers → View other club types

Price guide

Price estimates appear once there are a few listings to compare by condition.

Specs

Key facts for this model - individual clubs may vary.

Brand Callaway
Series Big Bertha
Generation Big Bertha Reva 21
Variant OS
Released 2021

Other Big Bertha Reva 21 driver variants

Compare variants

Driver

Available

Standard

0

Balanced forgiveness, versatile distance, pure consistency.

View Standard →