Why You'll Love It: The SD-X is one of the most propulsive sprint spikes we've ever carried, with its high rebound FuelCell midsole and carbon fiber plate Category: Sprinting track spike Weight: 5.3oz Featuring a carbon fiber plate with built-in pins for rigidity and traction, the FuelCell SuperComp SD-X will be your go-to competition spike for sprinting. Designed to meet the needs of elite athletes, this track spike has a lightweight, high-rebound FuelCell midsole underfoot that provides exceptional energy return. The knit upper is reinforced at strategic points for a lightweight yet structured feel. KEY FEATURES FuelCell foam delivers a propulsive feel to help drive you forward Lightweight synthetic knit upper with strategic internal reinforcement Full-length external carbon fiber plate with six built-in pins for rigidity and traction Lace closure Designed for elite sprinters in the 100-800m distances SIZING GUIDE Unisex shoes use men's sizing. For a women's fit, take your general shoe size and subtract 1.5 (ie: a women's 8.5 would be a unisex 7 for this shoe)
