FuelCell SuperComp LD-X 3 vs FuelCell SuperComp MD-X 3

The FuelCell SuperComp LD-X 3 is New Balance's long-distance track spike, built for the 5,000m, 10,000m and steeplechase rather than the road. It sits at the sharp end of New Balance's racing line, a full-length carbon spike aimed at runners who live for the last lap. If your events are shorter and sharper, the SuperComp MD-X 3 is the middle-distance sibling, but for the long stuff this is the one. This is a running shoe in the loosest sense. It is a track weapon, stripped down and firm, with just enough FuelCell foam under a rigid carbon plate to give you propulsion without slowing the transition. At GBP 160 it is priced with the premium spikes it competes against. We rate it as a genuine championship-level option for distance track racing, and the steeplechase-ready build widens its appeal beyond the flat. If you race on the track and want carbon propulsion through every stride, it belongs on your shortlist. Just know it is single-minded: this is race day only.

The FuelCell SuperComp MD-X v3 is New Balance at full send: a carbon-plated middle-distance track spike built for the 800m through the mile and into 3000m. This is not a road shoe you can jog in. It is a racing spike, all pins and plate and pop, meant for hard efforts on the track and nothing else. At around 170g it is light without feeling flimsy, and the FuelCell foam under the carbon plate gives you more bounce underfoot than a traditional bladed spike, so you get some cushioning to hold form on the back half of a longer rep. New Balance sits it above their long-distance sibling, the SuperComp LD-X, which is tuned for 5000m and 10000m. In our view the MD-X is one of the sharper middle-distance super-spikes going, and a serious option if you race on the track and want plate-and-foam propulsion under a spike plate. Just know exactly what you are buying.