The B4B Test

Gaylor Curier

Former professional player in Betclic Elite

Verdict

The Ja 4 moves away from the flashy design of the Ja 3 to return to a simpler—and likely more practical—design for most basketball players. A firm, agile, and sturdy pair. With very effective lateral traction and excellent forefoot support, it’s a good fit for the average player, but the slight heel play, mid-range materials, and merely adequate stability prevent it from rising to the next level...

Key Points

Excellent lateral grip with quick bite and a rounded tread pattern that handles direction changes very well
Less predictable grip during forward and backward movements and on dusty surfaces.
Cushlon 3.0 + SPRPWR midsole: firm, controlled, and slightly dynamic cushioning; much less compressible than the Ja 3
Excellent forefoot support thanks to the snug fit, the outrigger, and the lateral “A” reinforcement
More freedom in the heel
A design built for agility: a platform that closely mimics the foot’s natural shape and allows for a wide range of motion
Decent stability but a relatively narrow base: the choice clearly favors mobility
Mid-range materials and a stiff shoe right out of the box, requiring a proper break-in period.

Target Profile

Recommended for players looking for:

Agility and Changes in Direction
a short, intermediate-level feel
responsiveness
a simple and versatile pair

Fit: True to size for most players. Consider going up ½ size if you have wide toes. If you have a wide midfoot, try them on if possible to check the pressure exerted by the “A” support.

Nike Ja 4: Performance Profile

10 features evaluated in the field by our expert. Hover over or click a feature for more details.

Read the full review

Description

Ja's ability to leap is a true nightmare for his opponents, and the Ja 4 delivers the bounce that will send shivers down their spines. The Cushlon 3.0 foam with responsive cushioning enables explosive jumps and cushions every landing. The shoe features a streamlined support system and a comfortable upper for a secure fit. You’ll be able to strike fear into any defender in your path.

A lightweight, responsive insole sits atop our springy Cushlon 3.0 foam for optimal cushioning during basket-shaking jumps.
The lightweight, durable foam upper provides optimal support for quick movements, while a textured haptic panel adds texture and durability. The JA structure wraps around the midfoot for optimal support and enhanced stability, while maintaining great agility.

The durable rubber outsole, featuring a traction pattern inspired by the logo, grips the court as if it were your own, so you can play fast and fearlessly.
Ja’s words come to life with every step. His phrase “If you are down there” is molded into the outsole, and the quote “I don’t only have motion where my feet are at, it’s global” is visible on the side of the JA structure.
Ja shakes up the defense. This Obsidian and Volt Green colorway evokes the terrifying moment when he bursts onto the court and his opponents’ reluctance to become his next victim.

Benefits

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Click & Collect
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