Progress Golf BB6 SB-03 Driver Head

BB6 SB-03 Driver Head | Endless Ambition Series R&A / USGA SLE Rule Conforming Double Impact. Low CG. Stronger Ball Flight. The BB6 SB-03 is a precision-engineered Japanese driver head built for golfers who demand more distance without sacrificing control. Through its proprietary Power Center Bridge Structure and a redesigned shallow-back profile, the SB-03 delivers explosive ball speed, a penetrating low-spin trajectory, and the versatility to be tuned exactly to your swing. Power Center Bridge Structure At the heart of the SB-03 is a radical redesign of the sole. Where the BB6 MB-02 distributed its bellows bridge across the sole, the SB-03 concentrates the entire flex zone at the sole centre. At impact, force from the head is channelled directly into this zone — amplifying the flex and snap-back of the inner bellows and sending the ball off the face faster. The result is a more stable head path through the swing and a measurable increase in initial ball velocity on every strike. Shallow-Back Design for Lower CG Compared to the MB-02, the SB-03 features a lower rear profile — a shallow-back shape that drops the centre of gravity 2 to 3mm lower. This reduction in CG height decreases backspin and promotes a higher launch angle, producing the kind of strong, boring ball flight that holds its line in the wind and carries further downrange. Dual Weight System — Tune Your Trajectory Two interchangeable sole weights (standard configuration: 10g rear + 2g centre) allow you to independently adjust CG depth and CG height to match your swing speed and desired shot shape. • Normal Position (10g rear / 2g centre): Higher MOI at 4,350 g·cm², deeper CG, more forgiveness, standard spin. Ideal for players seeking stability and a draw-friendly setup. • Low-Spin Position (2g rear / 10g centre): Forward CG shift reduces spin for a tighter, more piercing trajectory. Built for faster swingers chasing extra roll and distance. Optional weights available separately from 2g to 14g, giving you complete control over how this head performs. Just-Meet Neck Adjuster The SB-03’s adjustable hosel lets you fine-tune loft, lie angle, and face angle independently — so you can dial in ball flight for any course, condition, or swing tendency without changing equipment. • L Type (9.5°): Adjustable from 8.5° to 10.5° • H Type (10.75°): Adjustable from 9.75° to 11.75° • Lie angle adjustable up to 61.0° Specifications |Construction |3-piece body | |Face Material |ZAT158Ti (forged) | |Body Material |8-1-1 Titanium precision cast| |Crown & Sole |Carbon composite (partial) | |Head Volume |460cc | |Head Weight |199g ±2g | |Standard Weights|2g (centre) + 10g (rear) | |Rule Compliance |R&A / USGA SLE Conforming | In the Box: Head cover included. Torque wrench available separately. Feel free to ask if you’d like a shorter version, a different tone, or a Japanese-language variant for a separate listing.​​​​​​​​​​​​​​​​