Ashaway ZyMax 66 Fire is a 0.66mm performance badminton string designed to give a strong balance of repulsion, control and durability, sitting nicely between thinner speed-focused strings and thicker durability-focused options.

It uses Ashaway’s ZyWeaVe™ core technology, which is designed to improve tension stability and keep the string bed feeling more consistent over time. The 0.66mm gauge gives a crisp, lively response with good shuttle speed, while still offering a little more robustness than ultra-thin strings.

Gauge: 0.66mm
Feel: Crisp / medium-firm
Performance: Strong repulsion with a stable, responsive feel
Control: Very good — predictable response with good feedback on placement shots and drives
Durability: Good — more durable than thinner 0.63–0.64mm performance strings
Tension stability: Excellent — designed to hold tension well and maintain consistency
Best suited to: Intermediate to advanced players who want a quick, responsive string without sacrificing too much durability