Cut in half: Nike ACG Ultrafly Trail Review (2026)

Key Points:

• The Nike ACG Ultrafly Trail is a significant improvement over its predecessor, featuring a dual-plate setup, upgraded ZoomX foam, and reduced weight, making it ideal for easy trails and gravel roads with excellent energy return and stability.
• It offers impressive cushioning with 137 SA in the heel and 103 SA in the forefoot, but heavier runners might find the forefoot cushioning insufficient for ultra-long distances; the shoe has a high 10.7 mm drop, which may not suit all trail runners.
• The outsole uses Vibram Megagrip Litebase with shallow 3.0 mm lugs designed for less technical terrain, and the shoe's moderate stiffness and torsional flexibility enhance comfort and adaptability on trails.
• The fit is roomy with a wide midsole and toebox, supporting foot expansion during long runs, but the upper has poor breathability, making it less suitable for hot weather conditions.
• Priced at $260, the shoe is a premium option that may deter some buyers, especially given its lack of removable insoles and absence of reflective elements, but it excels in cold-weather performance and durability in heel padding.