Who should buy the Asics Gel Flux 4

  • Ideal choice for budget-conscious mid-distance runners with neutral pronation who want a solid combination of quality and performance.
  • Recommended for daily roadrunners and entry-level runners who want a resilient shoe that is energy efficient and comfortable.

Asics Gel Flux 4 logo

Updates to the Asics Gel Flux 4

  • Softer mesh with very open holes to create a two-way effect.
  • The upper is significantly more breathable while the neutral running shoe has a more sock-like fit.
  • Removal of the thick and stitched forefoot overlays reduces the risks of irritation and gives more breathing space in the forefoot.
  • Added thin but welded overlays to help secure the midfoot and the forefoot.

Asics Gel Flux 4 updates

Delivers durability and more traction

The outsole of the Gel Flux 4 is a standard Asics application like its latest version, the Gel Flux 5, where the sturdier AHAR rubber is located in areas that require more protection from wear and tear.

Asics Gel Flux 4 traction

A softer blown rubber, called the DuraSponge is utilized in the forefoot for added cushioning and more traction.

Asics’ staple technology, the Guidance Line, or a substantial vertical cut that spans almost the entire outsole helps with the movement from the back to the forefoot of the running shoe. There are also substantial flex grooves in the forefoot for flexibility.

Gel Flux 4 provides lightweight responsive cushioning

The midsole is where Asics makes its name in the 4th version of the Flux. It houses two of Asics’ more popular technologies in the Gel cushioning system that is featured in the heel and the forefoot for more shock-absorption and the SpEVA foam for lightweight responsive cushioning.

Asics Gel Flux 4 midsole

Same as the popular Asics Gel Cumulus 20, the SpEVA covers the entire midsole of the Gel Flux 4 for quick and smooth transitions. Providing that trademark Asics midfoot integrity is the TPU-made Trusstic system.

Asics Gel Flux 4 offers breathable coverage

The upper is a very simple mix of very breathable mesh and supportive overlays. Asics uses a combination of stitched overlays near the heel for enhanced security while the midfoot and forefoot overlays are welded.

Asics Gel Flux 4 breathable shoe

A very well-padded collar and tongue add plushness to the ride. The removable sockliner allows the runner to use his or her own orthotics.

Facts / Specs

Terrain: Road
Weight: Men 352g / Women 258g
Drop: 10mm
Arch support: Neutral
Update: Asics Gel Flux 5
Forefoot height: Men 13mm / Women 12mm
Heel height: Men 23mm / Women 22mm

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Asics Gel Flux 4 video reviews

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.