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Size & Fit
we’ve exclusively built it for the Endorphin Elite
and the narrower profile with increased stretch is specifically designed to fit women’s feet and toes
Revised lug orientation
100 mg calcium
New Balance FuelCell SuperComp SD-X track Size & FitDescription Featuring a carbon fiber plate with built in pins for rigidity and traction, our 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. Features FuelCell foam delivers a
