U.S. Kids Golf UL7-57 (145cm) W15 junior driver, 17°

The U.S. Kids Golf UL7-57 Driver W15 is a purpose-built junior driver engineered for young golfers around 145 cm (57″) tall who are beginning their journey on the course. Available here in a left-hand configuration, this club combines a re-engineered aerodynamic head shape with an ultra-lightweight w15 construction — delivering 15% lighter club heads than a standard adult driver — so that even players with slower swing speeds can launch the ball higher, farther, and more consistently. Developed in partnership with Trackman launch-monitor technology, the UL7-57 Driver has been fine-tuned to maximize distance and forgiveness right from the very first tee shot.

• Re-engineered Aerodynamic Shape — The refined head geometry was designed with aerodynamics research at its core, reducing drag through the swing and producing the fastest clubhead speed in the UL driver lineup for longer drives off the tee.
• w15 Ultralight Head (15% Lighter) — At just 170 g, the w15 head is significantly lighter than a conventional driver head. This lower mass is ideally matched to junior swing speeds, promoting a higher launch angle and reduced spin for maximum carry distance.
• High-MOI Forgiving Design — A higher moment of inertia (MOI) combined with the lightweight construction makes off-centre strikes far more forgiving, so young golfers can build confidence while developing consistent ball-striking habits.
• Thin Face & Crown for Ball Speed — A thinner clubface and a thin crown flex at impact to transfer more energy to the ball, boosting ball speed and helping junior players reach distances they could not achieve with heavier, adult-spec equipment.
• 17° Loft for Optimal Launch — The higher-than-standard 17° loft is specifically calibrated for slower swing speeds (up to 65 mph), generating a steep launch angle and controlled spin rate that keeps the ball in the air longer.
• Frequency-Tuned K-Flex Graphite Shaft — The ultra-light K-Flex graphite shaft is frequency-matched to the 170 g head weight, creating a harmonised feel through the swing that encourages proper mechanics and effortless power transfer.
• Size 57 Velvet Grip — The correctly sized velvet rubber grip fits junior hands precisely, promoting a secure and comfortable hold without the over-gripping that can result from an adult-sized handle.
• Trackman-Optimised Performance — Every dimension of the UL7-57 Driver — from loft angle to shaft flex — was verified and refined using Trackman launch-monitor data to ensure peak distance and forgiveness for the target player profile.

Additional specs: Head weight 170 g • Shaft: K-Flex Graphite • Grip: Size 57 Velvet Rubber • Hand: Left • Headcover not included (available separately – w15 variant)

Why Lighter Clubs Mean Better Junior Golf

Adult drivers are engineered for swing speeds of 85 mph and above. A junior golfer of 145 cm typically generates swing speeds well below that threshold. When an undersized player swings a club that is too heavy, they are forced to compensate — dropping the lead shoulder, casting early, or decelerating at impact — all of which ingrain poor habits that are difficult to correct later.

The w15 system addresses this directly. By reducing head weight by 15% and pairing it with a frequency-tuned K-Flex graphite shaft, U.S. Kids Golf creates a total club weight that allows a junior to swing in balance, maintain their tempo, and strike the ball with maximum efficiency. The 17° loft further compensates for lower launch angles that naturally result from slower swing speeds, ensuring the ball climbs steeply and carries the distance the junior has actually earned with their swing.

All of these parameters were validated using Trackman technology — the same dual-radar launch monitor used by tour professionals — ensuring that the UL7-57 Driver is not simply scaled down from an adult club, but genuinely optimised from first principles for its target player.

UL7 Driver Series — Size Guide

Fit by player height (shoes on). The UL7-57 is the correct size for juniors standing approximately 145–152 cm tall.