Nike ACG Ultrafly Trail: Ultra-Energy Meets Rugged Grip
Nike’s ACG Ultrafly Trail is a high-energy trail super shoe designed for ultramarathons, combining two-density ZoomX foam, dual spoon carbon plates for adaptive stiffness, and a Vibram Megagrip Litebase outsole to deliver exceptional energy return (75.4%) and stability on easy trails and gravel. Its high drop (10.7 mm) and roomy forefoot promote a confident ride, but heavier runners may want more forefoot cushioning and breathability is limited. At about $260, it’s a premium choice best suited for open-terrain ultras rather than technical trails, with alternatives like Saucony Xodus Ultra 4, Hoka Tecton X 3, and Adidas Terrex Agravic Speed Ultra worth considering.