Yonex BG 66 Force Badminton String (White)

The Yonex BG66 Force (BG66F) is a specialized, premium performance string that pulls off a clever physics trick: it takes the lightning-fast, ultra-thin 0.65mm gauge profile and infuses it with a shock-absorbing coating to give it a solid, heavy, and smash-focused feel.

While its famous sibling, the BG66 Ultimax, focuses on crisp, instantaneous speed, BG66 Force is engineered explicitly for attacking players who want the rapid racket head speed of a thin string but want their smashes to feel incredibly heavy and devastating upon impact.

Core Construction & Technology

The unique, heavy-hitting personality of BG66 Force comes down to a specialized material treatment:

1. Ultra-Thin 0.65 mm Gauge: The thin baseline cuts down on aerodynamic drag, allowing you to whip your racket through the air faster for maximum swing velocity.
2. High-Intensity Nylon Multifilament Core: Densely packed, ultra-fine core fibers provide excellent elasticity and deep baseline-to-baseline clear depth.
3. Special Nylon Coating / Shock Absorption Matrix: This is the magic ingredient. Yonex treats the outer braiding with a unique compound coating that dampens harsh, high-pitched vibrations. This gives the string bed a "meatier," more solid sensation when making heavy contact with the shuttle.

Playing Characteristics

1. Heavy Smash Power (9.5/10): Unlike many thin strings that can feel a bit "pingy" or thin on a full smash, BG66 Force gives you a massive, driving sensation. The shuttle feels like it sinks into the string bed for a split second before exploding forward with heavy downward weight.
2. Effortless Repulsion (9/10): Thanks to the 0.65mm gauge, you don't need massive physical effort to clear baseline-to-baseline. A quick, sharp wrist snap engages the core fibers perfectly.
3. Dampened, Solid Feel: It is categorized as a Medium feel string, but it sits in a very unique pocket. It lacks the harsh, metallic stiffness of classic BG80, instead offering a smooth, solid punch that is very gentle on the wrist and elbow.
4. Durability Trade-Off (4.5/10): Because it is a performance-tier 0.65mm string, durability is a compromise. It will outlast ultra-thin strings without coatings, but hard smashers or players who occasionally mis-hit the shuttle near the top of the racket frame will snap this string much quicker than a 0.70mm utility string like BG65.

Who is it for?

1. Attacking Players Who Love Thin Strings: If you want the speed and quick handling of a 0.65mm string but hate a hollow or ultra-stiff feel, BG66 Force gives your smashes the "heavy" authority they need.
2. Intermediate to Advanced Tournament Competitors: It performs beautifully at competitive tensions (24–28 lbs) where the balance of quick repulsion and solid impact can be fully utilized to dictate fast rallies.

Specifications

• Gauge / Thickness: 0.65 mm.
• Color: White.
• Length: 33 ft. / 10 m.
• Material Core: High-Intensity Nylon Multifilament.
• Outer Coating: Special Braided High Polymer Nylon Fiber.
• Feel: Medium (Leaning toward a solid, damp, driving feel).
• Main Characteristic: Repulsion Power joined with Heavy Smash Impact.
• Country of Origin: Japan.