Verdict from 19 experts and 100+ user reviews

9 reasons to buy

  • A majority of fitness enthusiasts lauded the Reebok CrossFit Nano 4.0 as one of the best shoes for CrossFit and other high-intensity workouts.
  • The comfortability offered by the trainer pleased a great number of owners.
  • The snug and secure heel, yet roomy toe box, were appreciated by numerous reviewers.
  • The quality build and durability of the footwear made it well worth the price, said a lot of gym-goers.
  • The light construction of the product pleased multiple users.
  • A fair number of training aficionados raved about the overall flexibility of this model.
  • More than a few testers enjoyed the breathability of the upper material.
  • The grippy outsole was commended by several people.
  • A few individuals were delighted that the footgear did not need to be broken in.

3 reasons not to buy

  • The back of the upper was rigid and caused blisters, complained several consumers.
  • The arch support was lacking, according to some wearers.
  • A few buyers thought that the product was a bit expensive.

Bottom line

The Reebok CrossFit Nano 4.0 exceeded the expectations when it came to high-intensity workouts. Other positive remarks included the snug fit, the roomy toe box, and the comfort. A handful of complaints did not hold the shoe back from becoming a recommended CrossFit trainer.

Tip: see the best crossfit training shoes.

Good to know

The Reebok CrossFit Nano 4.0, as the name implies, is a shoe created specifically for CrossFit. It is equipped with technologies that provide support, steadiness, and agility, assisting the wearers’ throwdown at the box.

The trainer shares a striking resemblance to its predecessor, the CrossFit Nano 3.0 thanks to the Duracage protective cover. Though the design of the structure is more refined in the CrossFit Nano 4.0. The most obvious difference is the absence of the Reebok Vector logo on the lateral side of the Duracage in this new iteration. Instead, the Delta logo is more prominent, along with the CF74, a nod to the year 1974, the year CrossFit was born.

The underside of the Reebok CrossFit Nano 4.0 is protected by a rubber compound manufactured to be durable to withstand training on rough surfaces. It features a tread pattern that promotes multi-directional traction. It also wraps up the medial and lateral sides of the midfoot, forming the RopePro structure that bites the rope, assisting wearers to ascend and descend cables.

Examining the bottom of the footwear, there are noticeable ridges called the Metasplit. They mimic the phalanges of the foot, allowing it to bend and move naturally.

The midsole of this Reebok trainer is made up of two compounds. The forefoot uses the F48 cushioning unit that not only attenuates shock but also promotes flexibility. The midfoot and the heel are lined with the S55 material which also absorbs shock, has a high energy return, and is solid to keep the rearfoot steady during plyometrics, lifts, and squats.

The low-profile cushioning platform also has a 4-mm heel-to-toe drop. This construction allows the wearer to feel planted to the ground and feel stable during dynamic movements.

Protecting the top of the foot from outside elements is the open weave mesh upper. This material is soft and pliable, allowing the foot to move. It is also breathable and keeps the foot chamber well-ventilated.

The upper is reinforced with the Duracage which is made of polyurethane (PU), a type of plastic that is sturdy. It creates a wrap that protects the quarters during rope climbs. It extends to the back of the shoe, creating a heel cup to keep the rearfoot steady. The Duracage is also seen at the forefoot, forming a toe bumper that protects the toes during burpees.

The lacing system at the midfoot integrates with the Duracage. When the laces are cinched, the lateral structures are drawn in, amplifying the support for side-to-side movements.

Further securing the locked-down fit is the plush tongue and collar. The tongue evenly distributes the pressure created by the laces to keep the foot comfortable and secure inside the shoe. As for the collar, not only does it prevent chafing at the Achilles, but also prevents the back of the foot from sliding out while training.


How Reebok CrossFit Nano 4.0 ranks compared to all other shoes
Top 14% crossfit training shoes
All crossfit training shoes
Top 11% Reebok training shoes
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Top 3% cross-training training shoes
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The current trend of Reebok CrossFit Nano 4.0.
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Nicholas Rizzo
Nicholas Rizzo

Nick combines 10+ years of experience in the health and fitness industry and a background in the sciences in his role as the Fitness Research Director. During his competitive powerlifting years his PRs have him sitting in the top 2% of bench presses (395 lbs), top 3% of squats (485 lbs) and top 6% of deadlifts (515 lbs) for his weight and age. His work has been featured on, LiveStrong, Healthline, WebMD, WashingtonPost, and many more. Along the way, collaborating with industry leaders like Michael Yessis, Mark Rippetoe, Carlo Buzzichelli, Dave Tate, Ray Williams, and Joel Seedman.