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SPEEDBACK™ Technology designed to give Juniors the performance they need to achieve their best potential. Available with a FREE shaft upgrade as your young golfer develops their game.

Regular Price: $349.00

Special Price $249.00

Availability: In stock

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Regular Price: $349.00

Special Price $249.00

KING F9 Driver
  • What Is It

    The KING F9 SPEEDBACK™ Junior Driver is designed to equip Juniors with the performance they need to achieve their best potential. Designed with a shorter and softer shaft, a lighter swing weight and a higher loft range to provide maximum speed, distance, and forgiveness for young golfers.


    Designed for beginner to advanced Junior golfers ages 8 to 14 with moderate to faster swing speeds.

  • Why we made it

    SPEEDBACK™ Technology delivers the ultimate combination of speed, distance, and forgiveness for Junior golfers. A lighter weight configuration paired with adjustable CG and MyFly loft technologies allows Juniors to fine-tune their launch and spin conditions as they develop their game.

King F9 Driver Grass Laydown

The Ultimate
Formula for Speed.

Longer starts with Faster. Faster starts with SPEEDBACK, a revolutionary advancement in low CG, efficient aerodynamics, and precision CNC milled face technology that delivers the Ultimate Formula For Speed.

KING f9 Speedback

Speedback Aero Design.

SPEEDBACK Technology delivers Cobra's most aerodynamic club shape which utilizes rounded leading edges, a raised crown, a raised skirt and a raised tail. This design streamlines the clubhead to promote an uninterrupted flow of air from the leading edge to the tail, to reduce drag and increase club speed.

KING F9 Driver Aero

Optimized Aero and Low CG.

A low CG structure comprised of titanium and tungsten moves the CG low and deep, creating a more efficient transfer of energy to the ball for optimized launch and spin, while maintaining an aerodynamic shape.

KING F9 Driver Low CG

CNC Precision
milled face.

In an industry where everyone claims to have a fast driver face, ours is the only one that is CNC milled. A process that is up to 5 times more precise than conventional hand-polished driver faces, CNC milling delivers our thinnest and hottest face design repeatedly on every driver.

CNC Milled face driver


CNC milling allows face thicknesses and curvatures to be controlled to tighter tolerances, ensuring consistent performance across every driver manufactured.


CNC milling is an industry leading technology that took two and a half years to perfect. We are the only company to feature CNC milling in both our driver and fairway faces.


CNC milling yields more precise face thickness compared to manual hand polishing, allowing us to design a thinner and faster conforming face.

Speed Tuned

Dual Roll adds distance to your drives by reducing the gear effect that negatively impacts launch and spin on shots hit high and low on the face. Each driver is SPEED TUNED with optimized top and bottom curvatures to tune launch and spin for different swing speeds and attack angles.

SPEED Tuned Performance

Dual Roll Technology.

Bulge and roll curvatures are CNC milled into the face following exact specifications in the 3D CAD file design to ensure consistent performance in every driver we manufacture.

1. Top Roll Curvature

The top half features more curvature than the bottom half of the face to promote higher launch with reduced spin on shots hit above the centerline.


The axis is tilted at a 7 degree angle to account for the amount of toe droop that occurs during a typical swing.


The bottom curvature is SPEED TUNED to optimize the loft of each driver head (9.0, 10.5, 12.0 to 12.5 women's & junior's) to maximize launch and spin for different swing speeds and attack angles on shots hit below the centerline.

Dual Roll Technology


Three different horizontal bulge curvatures are CNC milled into the face to control loft and face angle on the heel, toe and center areas. Having perfected bulge curvatures is crucial to minimize the gear effect on shots hit on the toe and on the heel so the ball ends up closer to the target line.

King F9 Bulge

E9 Technology

E9 Technology is a variable thickness structure designed in an elliptical shape (along 9 different points) that expands the SWEET ZONE across a typical miss-hit pattern that ranges from the low heel to high toe areas.

King F9 E9 Face Tech

Straighter, More
Consistent Ball Flights.

E9 and Dual Roll technologies are optimized for each driver loft, while CNC milling creates precise bulge and roll curvatures to improve driving accuracy and distance on off-center hits.

Low heel shots with CNC milled bulge & Roll

High Toe shots with CNC milled bulge & Roll

Other guys without CNC milled bulge & Roll

King F9 Ball Flight


Continually pushing the boundaries of innovation, Cobra engineers have created our largest carbon fiber crown design that is the first to wrap over the crown onto the body. This design produces a 12% larger carbon fiber area that saves 10 grams compared to titanium driver crowns.

F9 Carbon Crown Wrap

PWR Ridges

Engineered creases called PWR Ridges frame alignment and add rigidity to the carbon crown structure to create more energy return and power to the ball to maximize speed.

King F9 Bulge


Polymer crown trips are positioned relative to the direction of airflow around the club head to reduce drag and increase clubhead speed. Using a lightweight polymer material on the crown trips improves aerodynamics without raising the center of gravity. Titanium trips are positioned on the sole to speed up the flow of air traveling underneath the driver.

King F9 E9 Face Tech

Tune Your
Ball Flight.

The KING® F9 SPEEDBACK™ drivers feature adjustable center of gravity (CG) and MyFly loft technologies, allowing you to fine-tune trajectory and launch to maximize distance.

F9 Tune Your Ball Flight


Customize your center of gravity (CG) position using moveable weight technology. A heavy weight (14g) and lightweight (2g) can be moved to the front or back position to fine-tune trajectory, launch and spin.

Front and Back Positions

MyFly 8 with Smart Pad

8 easily adjustable loft settings allow players to manage launch and spin conditions to optimize distance. Smart Pad Technology keeps the face square at address regardless of the loft setting.

MyFly 8 with Smart Pad


The KING® F9 SPEEDBACK™ drivers are equipped with COBRA CONNECT Technology, Powered by Arccos. Electronically enabled grips work in conjunction with the Arccos Driver app on your smartphone, allowing you to leverage the power of data to take your game to the next level.

Track And Tune
Track And Tune


COBRA CONNECT Technology analyzes every aspect of your game, so you can eliminate guesswork and make smarter shot decisions. All of your shot data syncs automatically to your smartphone in your pocket so you can review your progress during and after your round.

Range Finder


Using advanced GPS distances on over 40,000 courses worldwide, COBRA CONNECT records the distance of every drive, so users can track their improvements.

Smart Distance


The Driver Tuning feature on the COBRA CONNECT app leverages advanced data to recommend optimal loft and weight settings for you.

Tour Analytics


Learn your strengths and weaknesses by analyzing distance, dispersion and percentage of fairways hit so you can practice more efficiently and improve faster.


Use the fitting chart below to pick your driver based on height and age.

Typical Age 8-9 10-11 12-14
Typical Height 45" - 55" 50" - 60" 55" - 70"
Recommended Length 39.25" 41.25" 43.25"
Recommended Loft 13.5° 12.5° 11.5°

The KING F9 SPEEDBACK™ Junior Driver is fueled with the same technologies as the men’s SPEEDBACK™ Driver, only with a shorter shaft length, lighter swing weight, and higher lofts ideal for the Junior golfer.

The Junior Driver is equipped with 2 (Front & Back) Center of Gravity settings. Position the 10g weight in the back position to promote higher launch, or position it in the front to promote lower launch with reduced spin.

The MyFly8 adjustable loft technology allows junior golfers to fine-tune their launch and spin conditions as their game develops, helping them manage their distance and trajectory. Eight easily adjustable lofts range from 11° - 14° (STD loft = 12.5°) including three draw settings: 11.5°, 12.5°, 13.5°.

The KING F9 SPEEDBACK™ Junior Driver then takes adjustability a step further with Smart Pad®, COBRA’s proprietary sole technology that maintains a square face at address regardless of the loft setting. This helps the junior golfer to align the club with a square face at address.


Since kids grow very quickly, we continue to offer a FREE Shaft Upgrade with the purchase of a KING F9 SPEEDBACK™ Junior Driver. You can register your driver and email the registration info to customerservice@cobragolf.com and receive one free upgrade to a longer, firmer shaft when needed.  

Register Your Driver Here

Shaft Upgrade Options for the KING F9 SPEEDBACK™ Junior Driver are:

  • 41.25" Junior Shaft
  • 43.25" Junior Shaft
  • 44.25" Womens Shaft
  • 45.25" Adult Lite Flex Shaft
  • Specifications

    ModelLoft SettingsLie
    Length with
    Swing WeightHead
    KING F9 JR (12.5° ) 11° / 11.5° / 11.5° Draw / 12.5° /
    12.5° Draw / 13.5°  / 13.5° Draw / 14°*
    59.5° 39.25" (8-9 years)
    41.25" (10-11 years)
    43.25" (12-14 years)
    460cc Junior RH

    *Loft Adjustable Through MyFly8 Technology


    Cobra Junior Driver

    Cobra Junior Shaft

    Cobra Junior Driver

    Cobra Junior Shaft (Adult)

    Cobra Junior Driver

    Cobra Junior Shaft (Womens)


    COBRA Lamkin Crossline Connect

    COBRA Lamkin Crossline Connect - Black

    Customer Reviews 8 item(s)

    Awesome Jr.’s Driver
    Review by Eric - 1/14/2020

    Great driver for those kids in between kids clubs and adult clubs. My 10 year old son is consistently driving 25-30 yards farther.

    Outstanding driver for kids
    Review by Luca - 9/2/2019

    I bought this for my my son (just 11 years old). He was hitting his US Kids driver pretty far but with this new gear he get additional distance and consistency.

    Great driver
    Review by Jake - 8/17/2019

    My 12 year old gained 30-40 yards switching from USKids tour series to the Cobra F9. He is driving 225 now and can move back to the men’s tees. He loves the built in tracker as well. With the free shaft exchange, he will be playing this driver for at least 3-4 years.

    Review by Bear - 7/29/2019

    It is the best driver you could ask for it gets distance im hitting the ball great keep makeing great prouducts

    good driver, could use more shaft length options
    Review by Chris - 7/23/2019

    I bought this driver for my daughter who is upgrading from her USKIDS TS3 driver and set. I started with the shortest shaft available but it is still significantly longer than the shaft my daughter who is 43" tall can use without having to choke up somewhat. She is currently 10 years old. An additional shaft length slightly shorter in the 36" range would be helpful. Because of this we have had to put this driver back on the shelf for awhile.

    awesome driver
    Review by Edward - 6/24/2019

    this driver is awesome good look good performance it goes straight no matter where you hit the ball and it has given me a 50 yard advantage now i can hit the ball 220 yards

    10+ Yards Longer
    Review by Scotty1 - 5/13/2019

    My child has the Cobra Junior complete set. The driver in that set is good, but this driver is constantly 10+ yards longer. Great club for Junior golfers.

    Son's F9 Driver
    Review by Jose - 3/23/2019

    Consistent Driver, highly recommended.

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