Summary

We spent 8.7 hours reading reviews from experts and users. In summary, this is what runners think:

7 reasons to buy

  • Most reviewers have been very impressed by the comfortable ride of the Relentless 4.
  • The price is average.
  • The cushioning is soft with a hint of pop, noted several.
  • 6 amazing color options.
  • The shoe looks good, that it is often used by many as a lifestyle shoe.
  • Some have used the shoe as a gym partner for its comfort and support.
  • Others have used the shoe for sockless running.

3 reasons not to buy

  • A handful has experienced durability issues in the upper.
  • The traction needs improvement when used in wet areas.
  • It emits an annoying squeak when just walking that have embarrassed more than a few reviewers.

Bottom line

The Nike Air Relentless 4 is a simple, functional, and great-looking shoe that works as designed. It has good arch support, a wraparound fit in the upper, and a plush ride. Logging the miles in comfort in a shoe that can readily turn heads best describes the 4th version of the Relentless.

Facts

Rankings

Among the better Road running shoes
A top rated Nike running shoe
It has never been more popular than this June
Better rated than the previous version Nike Air Relentless 5
  • Nike gives the upper several modifications in the 4th ride of the Relentless. A notable change is the removal of the thick, stitched synthetic overlay on the forefoot. The overlay in the toe box is not as thick as before also. These modifications give the shoe more room and volume to enhance comfort for training sessions.
  • Another significant change is the use of a stitched overlay just beneath the collar on the medial side that extends to the heel. It helps with heel stability. On this stitched overlay, the Nike logo is fused on. The lateral side of the collar shows printed overlays to give the upper a more forgiving feel.
  • The Relentless 4 has a new engineered mesh for better support minus the stitched most of the stitched overlays.

The fit of the Nike Air Relentless 4 is classic for a trainer. It screams average from the heel to the forefoot. As such, it can be a good fit for those with narrow to slightly wider feet. The small difference between this model and the previous edition is the more relaxed upper and a little more room in the forefoot. Medium is the available width of the shoe. Sizing is spot on in the Relentless 4.


The outsole of this cheap running shoe is made of blown rubber in the forefoot and BRS 1000 carbon rubber in the heel area. Nike utilizes deep and wide flex grooves in the Relentless 4 to bring sole flexibility. Numerous square lugs enhance grip in this shoe.


Nike’s basic compression molded EVA in the Phylon runs the length of the shoe for soft and responsive cushioning. The full-length design helps with the transition from landing to take-off. Beneath this foam in the heel is a moderately thick Air unit for added cushioning and shock-absorption.


A new engineered mesh keeps the shoe as breathable as always, but ramps up the support without using too many overlays. The heel and tongue are plush with a very soft interior lining. A well-cushioned insole helps with the cushioning and fit of this shoe. The same in-shoe feel is also felt in the Nike Relentless 6.

Author
Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.

jens@runrepeat.com