Facts

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Terrain

Road

Shoes best for road, track and light gravel. See the best road shoes.

Trail

Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Arch support

Neutral / cushion / high arch

Shoes for runners who do not need any additional arch support (Around 50% of runners). Best for people with normal, high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

Motion control / severe overpronation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.

Competition

Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

Price
$100
Weight
Men: 12.4oz
Women: 9.1oz
Show more facts

Road

Shoes best for road, track and light gravel. See the best road shoes.

Trail

Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Neutral / cushion / high arch

Shoes for runners who does not need any additional arch support (Around 50% of runners). Best for people with high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who needs arch support (Around 45% of runners). Best for runners with a normal arch. See the best stability shoes.

Motion control / severe overproanation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.

Competition

Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

Summary

We spent 9.6 hours reading reviews from experts and users. In summary, this is what runners think:

7 reasons to buy

  • Several users claimed that they were able to stay up on their feet for long hours while wearing the 4th instalment of the Gel Flux.
  • More than a handful of runners use this shoe for gym workouts and while doing household works.
  • The price is considered by many as well worth the shoe’s performance.
  • The large, open mesh provides a very breathable coverage.
  • Asics uses a plush interior for a cozy feel with every run.
  • A few noticed barely discernible signs of wear and tear after considerable mileage.
  • The Asics Gel Flux 4 looks much better than its predecessor, according to some runners.

2 reasons not to buy

  • A handful of Flux fans were hoping for more weight reduction.
  • A few runners mentioned that the fit is a bit loose.

Bottom line

Budget conscious and entry level runners will continue to get a reliable and efficient performance in the Asics Flux 4. The shoe may not have the latest in Asics’ technology, but it does not scrimp on comfort or durability. It is a sturdy daily trainer that has sufficient arch support, security, and midsole resilience that will allow the runner to tack on the miles.


Rankings


Ratings

4.3 / 5 based on 113 ratings

5 star
65%
4 star
15%
3 star
9%
2 star
7%
1 star
4%

My Rating

Expert Reviews

Experts are runners, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

Are you an expert? Apply to contribute here.

76 / 100 based on 1 expert reviews

  • 76 / 100 by RunRepeat • Frank DuCett • Level 4 expert

    I am not looking forward to the next run in the Flux 4, primarily because of how they fit me. This will likely be a good shoe for many runners, though in my opinion not as good as last year's model.

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These are visual presentations, not reviews


Updates to Asics Gel Flux 4

  • The upper is where Asics concentrated the changes in the Flux 4. Most evident in the changes is the use of a softer mesh with very open holes to create a two-way effect.
  • The upper is significantly more breathable while the shoe has a more sock-like fit because of the improved way that the mesh conforms to the foot of the runner.
  • Another improvement in the upper is the removal of the thick and stitched forefoot overlays. Without these substantially thick and seamed overlays, there should be lesser risks of irritation and giving more breathing space in the forefoot.
  • In lieu of the thick overlays, Asics added thin, but welded overlays to help secure the midfoot and the forefoot. The new overlays also add a more sophisticated appeal to the shoe.

Asics Gel Flux 4 size and fit

The fit is where Asics tried to keep it as similar as the earlier model. One can surmise that the Gel Flux’s improvement in fit is a roomier forefoot. There is still more than adequate hold and security in the heel and the forefoot. Runners should also get the same ample space in the toe box. It runs true to size.


Outsole

The outsole of the Gel Flux 4 is a standard Asics application where the sturdier AHAR rubber is located in areas that require more protection from wear and tear. 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 shoe. There are also substantial flex grooves in the forefoot for flexibility.


Midsole

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. The SpEVA covers the entire midsole for quick and smooth transitions. Providing that trademark Asics midfoot integrity is the TPU-made Trusstic system.


Upper

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. 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.