The Ja Fly line has always been designed with the bend in mind. When we looked at the Ja Fly 3 in our best 200m spikes guide, the stand-out feature was a lacing system that ran down the side of the foot to stop lateral movement when you lean into the curve. Less foot movement means less wasted energy, which is exactly what you want at 200m pace.
The Ja Fly 4 continues as one of Nike’s lightest sprint models, aimed at 60m to 400m and the hurdles. It sits below the Maxfly and Superfly Elite in price, which makes it a sensible choice for improving sprinters who want a serious race spike without paying for carbon.
Who it’s for: 200m and 400m runners, and any sprinter who wants a light, secure spike at a mid-range price.
