Description Featuring a full-length carbon plate with four built-in pins for propulsion and traction, our FuelCell SuperComp LD-X will be your go-to competition spike for long distance races or the steeplechase. Designed to meet the needs of elite athletes, this track spike has a lightweight, high-rebound FuelCell midsole underfoot that provides exceptional energy return, along with innovative Energy Arc technology. The comfortable knit upper is reinforced at strategic points for a structured feel.