New Balance FuelCell MD-X Middle Distance Spike Altra Data from hundreds of runners

Data from hundreds of runners helped inform the design

EVA heel wedge offers added structure for optimal comfort and performance

now in a longer inseam

The 6-pin PEBAX spike plate has your back on the track

Arm Band Size: One Size Fits Most (9 in - 15 in)

New Balance FuelCell MD-X Middle Distance Spike Altra Data from hundreds of runnersCARBON TRACK HAWK. Form and function deliver ultra lightweight, innovative performance with the FuelCell MD X racing spike. This spike features an updated engineered knit upper for ultimate weight savings. Stacked with engineered technology such as FuelCell foam and a carbon fiber plate, the MD X gives you forward propulsion and performance ready style on middle distance track races. UPPER Lightweight synthetic knit with strategic internal