The ACG Ultrafly targets Spring 2026 as a trail-tuned super shoe built to handle rugged terrain. The shoe emerged from over 30,000 miles of wear testing conducted by Nike's All Conditions Racing Department to prioritize durability and performance. The midsole uses full-length ZoomX foam and a ZoomX sock liner for lightweight responsiveness, cushioning, and energy return over long distances. A carbon fiber FlyPlate provides propulsive toe-off and controlled flex for stability on uneven ground. A Vibram Lightbase outsole reduces weight while maximizing grip across wet, loose, muddy, and hardpack surfaces to enhance technical trail dependability.
Nike has built a reputation for pushing the boundaries of performance footwear, and its upcoming release, the ACG Ultrafly, is shaping up to be one of the most ambitious entries in the brand's trail lineup. Slated for a Spring 2026 launch, the ACG Ultrafly is being introduced as a "trail-tuned super shoe"-a bold claim backed by extensive testing, innovative engineering, and a design made to tackle the most rugged terrains.
The foundation of the ACG Ultrafly lies in Nike's premier foam technology. At its core is a full-length ZoomX foam midsole, known for its lightweight responsiveness and energy return. Complementing that is a ZoomX sock liner, which enhances comfort and maintains cushioning over long distances. To balance power and stability on uneven ground, the Ultrafly incorporates a carbon fiber FlyPlate.
One of the defining elements of any trail shoe is its outsole. For the Ultrafly, Nike partnered with Vibram, equipping the shoe with a Vibram Lightbase outsole. Designed to reduce weight without sacrificing grip, the Lightbase platform allows for superior traction across wet rocks, loose gravel, muddy paths, and dry hardpack. This attention to traction ensures that the Ultrafly is not just fast but also dependable when the trail gets technical.
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