Nike InfinityRN 4 review

The Heel

A few years ago, 39 mm of foam under the heel would have been considered a max-stack shoe, but standards have evolved.
Nike InfinityRN 4 review

Forefoot Stack

The forefoot stack of 30 mm provides ample cushioning for runners, making the shoe a reliable option even for long-distance runs.

Drop

Nike lists with a 9 mm drop, making it an excellent choice for heel strikers and runners who occasionally experience Achilles or calf issues.

The Uppers

Nike InfinityRN 4 review

Knit uppers are often very comfortable, but they can struggle with breathability, and this model is no exception. It doesn’t perform well in terms of ventilation, so we wouldn’t recommend it for hot summer runs.

Nike prioritized comfort with this design. The thick, stretchy upper hugs the foot, providing a secure and cozy fit that’s great for long runs—just as long as the weather isn’t too warm!

The Outsole

Nike InfinityRN 4 review
Nike’s focus for this outsole is clear: durability over grip. The outsole, made from one of the hardest rubbers, is built for long-lasting wear, and its toughness is immediately noticeable.

The Midsole

After six years, Nike has replaced its original React foam with ReactX in this running shoe. ReactX is a softer, more responsive version of React, offering an upgraded running experience. Additionally, Nike claims it has a 43% lower carbon footprint, which is a welcome step toward sustainability.

How Much Do They Weigh?

The shoe weighs 11.1 oz (316g), making it a moderately heavy option for runners.

How Do They Fit?

The shoe fits true to size, providing a well-balanced and moderately spacious fit that comfortably accommodates most runners.

How Much Do They Cost?

The shoe is priced at $160, positioning it as a mid-range option for runners seeking quality and performance.

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