Verdict from 3 experts and 100+ user reviews

5 reasons to buy

  • Many consumers found the Reebok RealFlex Train 4.0 to be a good-looking shoe.
  • According to numerous fitness enthusiasts, this training shoe was great for strenuous gym sessions.
  • Priced at $65, the shoe was considered as a good value for their money by a few buyers.
  • A majority of gym buffs liked that the shoe was comfortable and lightweight enough to be worn the whole day.
  • Cross-training enthusiasts have praised the support that the shoe provided during weightlifting and CrossFit sessions.

4 reasons not to buy

  • Many of the users criticized the trainer’s uncomfortable and hard sole.
  • The shoe’s opening was so narrow that it was hard to put the shoe on, based on various purchasers.
  • A small number of wearers have reported that the sides and the top of the upper ripped apart after only several uses at the gym.
  • Some people complained that the tread of the RealFlex Train 4.0 was spaced too far apart, which resulted in stones getting stuck in between.

Bottom line

Most buyers appreciated the shoe’s design, comfort, lightness, and support. On the flip side, the consumers were put off by the hard sole, the tight opening, and the flimsiness of the upper. But overall, the Reebok RealFlex Train 4.0 received general acclaim for being a budget-friendly cross-training shoe that fulfilled most of the demands of physical activities.

Tip: see the best workout training shoes.

Good to know

  • Adaptability to various workouts is the main focus of the Reebok RealFlex Train 4.0. The new iteration builds on the success of its predecessor. It inherits the waffle-like construction of the outsole to provide the ultimate flexibility in multiple directions.
  • The upper unit features the SmoothFuse overlays instead of the 3D FuseFrame. It is designed to provide a more lightweight, yet still firm support for the lateral and medial sides.
  • The trainer also employs the brand’s AdaptaLink technology. It is a lace-up closure which helps in dispersing tension on top of the shoe to offer a comfortable yet snug fit.

The Reebok RealFlex Train 4.0 is available in both men’s and women’s versions. It is designed to accommodate athletes with average foot measurements. The shoe comes in D – Medium and B – Medium width profiles for men and women, respectively.

The outsole of this Reebok trainer is made of the injection molded EVA (IMEVA), a lightweight, cushioned, and responsive material that is resistant to cracking and hardening.

The entirety of the bottom has strategically placed treads that are coated with carbon rubber to give powerful traction on diverse surfaces.

The deep flex grooves are placed throughout the unit. They ensure that the natural flexibility of the foot is not hindered throughout the training session.

The midsole is formed to cradle the foot and offer more support during lateral movements. It is padded with an EVA sock-liner for adaptive cushioning and sweat absorption.

It has a traditional heel-to-toe drop of 12 mm, accommodating those who have heel pain due to discomfort in the Achilles tendon, posterior tibial tendonitis, and plantar fasciitis.

The Reebok RealFlex Train 4.0 has a low-cut design that allows for more flexibility and freedom of motion during quick transitions.

The upper is made of a hexagonal mesh for a sock-like fit. The lightweight, synthetic SmoothFuse overlays on the midfoot are added for structure and support. The foot is locked down in place with the AdaptaLink lace lock system, an easy-to-adjust lacing system that gives a snug yet comfortable fit.


How Reebok RealFlex Train 4.0 ranks compared to all other shoes
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The current trend of Reebok RealFlex Train 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.