Gamma RZR Bubba 137 Tennis Racquet

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Item #: RGRZB
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Main String
Cross String


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The Gamma RZR Bubba marks the return of the beloved super oversized frame specification to Gamma's racquet line. The ultimate sweetspot of any game improvement frame on the market today, now with a more aerodynamic beam design and a striking new graphic. The most powerful option in the RZR line, with a super oversized 137 square inch head, 29-inch length, tapered 22/24/22mm beam, and 10.40 oz. strung weight for added forgiveness. Great option for the beginning to intermediate player with a slower swing. Quite hefty 408 swingweight, but surprisingly maneuverable and rewards those able to swing with amazing power! Denser 18x21 string pattern to keep the power in check.

Gamma RZR racquets utilize Advanced Aerodynamics, with unique geometric contoured shapes designed to deflect and streamline airflow around the frame. Rounded radius surfaces, Tapered Bridge Beam, and Low Profile Bumper allow the RZR beam to easily channel airflow around the frame regardless of attack angle. M Carbon composite matrix increases strength at key points on the frame for optimal power transfer.

NOTE: Due to the headsize of this racquet (and length of string required), any string upgrades will incur a charge for an additional set of string.

If selecting tension "Below Range", please note at checkout within the comments field your desired tension value.

  • Headsize: 137 sq. in.
  • Length: 29 in.
  • Weight (strung): 10.40 oz.
  • Stiffness (Babolat RDC): 65
  • Balance: 15.40 in. Head Heavy
  • Cross Section: 22/24/22mm Tapered Beam
  • Swingweight: 405 kg*sq. cm
  • String Pattern: 18x21
  • Grip:Gamma RZR Tac
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Product Review Summary
Based on 11 reviews
5 star average rating
Overall Rating: 5.0/5.0
Customer Reviews
January 24, 2023
Gamma RZR Bubba 137
This shopper rated the product 4 out of 5 stars

Enormous power but a real beast to swing!

November 06, 2021
This shopper rated the product 5 out of 5 stars

I'm a 65 yr old ranked senior 4.5 mainly playing singles. I've been using the 137 for a couple weeks and am very impressed. I've noticed improvements in all facets with no real downside. I like the head heavy feel for groundies and the xtra length has helped my serve, wide balls, and especially low, short balls. Currently strung with solinco confidential 18 @ 58.

Bob A
January 13, 2021
Bubba 137
This shopper rated the product 5 out of 5 stars

Great racket for me. Great doubles and mixed doubles racket. It has power and control and great on volleys. People now think my name is Bubba.

russell johnson
June 17, 2017
Makes me younger
This shopper rated the product 5 out of 5 stars

Great spin and power. Takes some getting used to. My friends who play the racket say 3 months to get touch. Very pleased.

Bruce Jacobs
September 02, 2016
This shopper rated the product 5 out of 5 stars

Love this racquet! As I’m reaching older age I have been testing a few extremely oversized frames to help me out on the court. The power on this frame is unbelievable! If you string this with a poly string, you can get great control and spin. I string mine at a low tension so I’m able to get that extra boost of power as well. Like I said I have been trying oversized frames for some time now, but none of them seem to compare to this. It seems to play as a smaller player’s racquet would! The sweet spot is great (and huge of course), but even if you are not right on the money this racquet helps you out in every way. I was shocked by the balance of power and control in this large of head size. If you are in the market for an OS frame, definitely give this a try!