ACG Ultrafly

Story

Carbon-plated speed meets elite Vibram® traction for the technical trail

The Nike ACG Ultrafly is a trail racing machine designed to turn technical terrain into a fast track. Built for speed and distance, this version refines the original with a softer, full-length carbon fiber plate that offers a smoother transition and better control on uneven surfaces. Grounded by an exclusive Vibram® Megagrip outsole, it balances ultralight ZoomX responsiveness with the rugged durability required to push through wet and rocky miles without weighing you down.

Features

• "Unwrapped" ZoomX foam in the heel delivers Nike’s most responsive energy return for peak trail speed
• Refined full-length carbon fiber plate provides a propulsive snap with increased flexibility for better control
• Exclusive Vibram® Megagrip outsole offers elite-level traction on slick, wet, and technical terrain
• Lightweight, high-tenacity upper engineered for maximum durability and breathable containment
• Strategic outsole design reduces overall weight while maintaining high-abrasion resistance for long-range racing

Sizing

• The ACG Ultrafly fits true to size. Take your usual shoe size.
• If you're not sure, compare your foot length to the chart below

Foot Measurements

US Men's Size EU Size Foot Length (in) 7 40 9 11/16 7.5 40.5 9 13/16 8 41 10 8.5 42 10 3/16 9 42.5 10 5/16 9.5 43 10 1/2 10 44 10 11/16 10.5 44.5 10 13/16 11 45 11 11.5 45.5 11 3/16 12 46 11 5/16 12.5 47 11 1/2 13 47.5 11 11/16 14 48.5 12

All measurements are in inches

How to Measure - Foot Length: Measure from the back of your heel to the tip of your longest toe

Materials

• Midsole: ZoomX foam with full-length carbon fiber plate
• Outsole: Vibram® Megagrip
• Upper: Lightweight trail-ready mesh

About

Nike exists to bring inspiration and innovation to every athlete in the world. By relentlessly pushing the boundaries of sports technology, they create high-performance gear that helps runners of all levels break barriers and achieve their personal best.