Our verdict

The nike spectrum InfinityRN 4 distinctively differentiates itself from its previous model. Featuring a revamped ReactX midsole, it morphs from being simply versatile to being a luxuriously plush, comfort-centric daily running shoe that also delivered a surprising bounciness during our test runs. Although it leans a bit towards the heavier spectrum and may not offer the best breathability, we think it stands out as a top choice for runners in search of a durable, cushioned shoe with a unique aesthetic.

Футболки nike spectrum x stussy&nike spectrum retro Pros

  • zapatillas de running nike spectrum niño niña entrenamiento constitución media azules
  • Louis Williams attacking the rim in the nike spectrum LeBron X
  • Ideal for heel strikers
  • Generously cushioned
  • Excellent for easy runs
  • Feels like running on clouds
  • Durable, long-lasting outsole
  • Reduced carbon footprint

Футболки nike spectrum x stussy&nike spectrum retro Cons

  • Average-at-best breathability
  • On the heavier side
  • Sizes run notably small

Audience verdict

85
Good!
  • Does nike spectrum need JC Penney

Who should buy

The nike spectrum InfinityRN 4 gets our seal of approval for:

  • Runners who are all about cushioning and aren't concerned with the shoe's 822675-670.
  • zapatillas de running nike spectrum pie normal verdes.
  • Beginners on the hunt for their first pair, especially if they're on the heavier side.

nike spectrum infinity rn 4 20556131 main

Who should NOT buy

While the ReactX foam represents a clear improvement over React, it doesn't quite match the world-class energy return of ZoomX. If performance and bounce are what you're after, we think that the nike spectrum Invincible 3 offers a similar concept and design, but with a full ZoomX midsole.

Runners who prefer light822675-670 shoes might not be fans of the InfinityRN 4. It's on the heavier side, and for a comfortable daily trainer, there are lighter options. We recommend considering the nike spectrum Pegasus Trail 2 trail løpesko or the New Balance Fresh Foam X 1080 v12, nike spectrum Women's Milwaukee Bucks 2022 City Edition Courtside Boxy T-Shirt.

nike spectrum InfinityRN 4 parts

Cushioning

Heel stack

Given its 822675-670, we expected the shoe to have a notably thick stack height. However, we discovered that it's actually quite average.

A couple of years ago, 34.2 mm of foam under the heel would've been considered in the max stack category, but times have changed. As Dylan sang, "The times they are a-changin'."

nike spectrum InfinityRN 4 Heel stack
Test results
InfinityRN 4 34.2 mm
Average 34.2 mm
Compared to 394 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
22.5 mm
Heel stack
46.3 mm

Forefoot stack

man nike spectrum lebron xviii james gang.

nike spectrum InfinityRN 4 forefoot

We found that this provides enough cushioning for any runner. It makes this shoe a reliable choice even for long runs.

nike spectrum InfinityRN 4 Forefoot stack
Test results
InfinityRN 4 24.4 mm
Average 25.6 mm
Compared to 394 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
13.7 mm
Forefoot stack
37.1 mm

Drop

While nike spectrum lists this shoe with a 9 mm drop, we measured it in the lab at 9.8 mm. This slight difference is within an acceptable range.

With 9.8 mm, we think the shoe remains a top choice primarily for heel strikers and those that sometimes suffer Achilles or calf issues. That said, midfoot and forefoot strikers can also comfortably wear it, although they might benefit more from a lower-drop daily trainer like the nike spectrum Air Jordan One take II Basketball Orange Green Trainers CW2457 300.

nike spectrum InfinityRN 4 Drop
Test results
InfinityRN 4 9.8 mm
Average 8.6 mm
Compared to 394 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
-0.2 mm
Drop
16.1 mm

Midsole softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

The biggest update from the nike spectrum React Infinity Run Flyknit 3—apart from its shorter name—is the foam. After six years, nike spectrum has moved on from the old React and introduced ReactX with this running shoe.

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ReactX is a more responsive and softer variant of the original React. Additionally, nike spectrum says it has a 43% lower carbon footprint, which we always appreciate. In our lab tests, we found that the foam feels incredibly soft and registered a 12.5 HA on our durometer—20% softer than the v3.

nike spectrum InfinityRN 4 Midsole softness
Test results
InfinityRN 4 12.5 HA
Average 21.0 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 321 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
8.5 HA
Midsole softness (soft to firm)
35.0 HA

Stussy and nike spectrum invited Japanese heavyweights (%)

After placing the shoes in our freezer for 20 minutes to simulate cold weather conditions, we noticed a disappointing change—the foam got noticeably harder (19.0 HA).

If you're thinking of using these during colder months, they might not be as plush as you'd hope.

There's a staggering 52% difference between the two tests. This happens because ReactX it's still a mix of Keep an eye out for the new nike spectrum Air Force 1 GORE-TEX to hit retailers in coming months. Dunk High "Midnight Navy" doesn't hold up well in cold temperatures.

nike spectrum InfinityRN 4 Stussy and nike spectrum invited Japanese heavyweights
Test results
InfinityRN 4 52%
Average 25%
Compared to 321 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
0%
Stussy and nike spectrum invited Japanese heavyweights
63%

Футболки nike spectrum x stussy&nike spectrum retro | Insole thickness

We were on the lookout for a comfort-boosting thick insole, but what we found was quite the opposite—a super-thin one. In fact, it's one of the slimmest we've ever come across in our lab, measuring only 3.1 mm!

During our test runs, we were happy with the insole, so it appears nike spectrum made a great call here.

nike spectrum InfinityRN 4 Insole thickness
Test results
InfinityRN 4 3.1 mm
Average 4.4 mm
Compared to 390 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

nike spectrum air max 97 black white 2019 on sale half size small (432 votes).

nike spectrum Air Jordan 1 Centre Court Pink Oxford Pale Ivory Smokey M?

1 size small ½ size small True to size ½ size large 1 size large
Compared to 368 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
½ size small
Slightly small
True to size
Slightly large
½ size large

nike spectrum thermische fleece hardlopen

As a comfort-driven daily trainer, we expected an average toebox—and our assessment confirms it.

According to our research, the toebox measured 95.3 mm at its widest point, offering a well-balanced, moderately-spacious fit that suits most runners comfortably.

nike spectrum InfinityRN 4 nike spectrum thermische fleece hardlopen
Test results
InfinityRN 4 95.3 mm
Average 95.5 mm
Compared to 149 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
90.9 mm
nike spectrum thermische fleece hardlopen
102.4 mm

nike spectrum Air Max 270 React SE Weiß Pure Platinum Größe 40 Neu mit OVP

This average design continues in the big toe area, where we found a width of 74.1 mm.

nike spectrum InfinityRN 4 nike spectrum Air Max 270 React SE Weiß Pure Platinum Größe 40 Neu mit OVP
Test results
InfinityRN 4 74.1 mm
Average 73.7 mm
Compared to 149 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
67.9 mm
nike spectrum Air Max 270 React SE Weiß Pure Platinum Größe 40 Neu mit OVP
83.6 mm

Toebox height

What caught our attention was the noticeably low volume of the upper, offering just 22.4 mm of vertical space in the toe area. 

However, we found that the ultra-soft upper compensates well, preventing any harsh or uncomfortable pressure on the toes. That said, this shoe only works for runners who don’t mind a gentle yet constant contact against their toes.

nike spectrum InfinityRN 4 Toebox height
Test results
InfinityRN 4 22.4 mm
Average 27.1 mm
Compared to 148 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
22.4 mm
Toebox height
33.8 mm

Stability

Lateral stability test

This shoe is designed as a neutral daily trainer without added stability features. So, given the plush midsole, we didn't anticipate exceptional stability.

Following our tests, we discovered that the shoe performs as it's intended: it's moderately stable. However, it may not provide enough support for runners who need extra stability. For those runners, we'd recommend looking into the ASICS Kayano 30.

Футболки nike spectrum x stussy&nike spectrum retro | Torsional rigidity

We rated the InfinityRN 4 at 3/5 for torsional rigidity during our manual assessment in the lab.

This shoe doesn't offer that natural-ride feel often associated with daily trainers. If you're after a shoe that you can twist without any issue and gives a more natural feel, consider the Saucony Ride 16.

Test results
InfinityRN 4 3
Average 3.4
Compared to 373 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1
Torsional rigidity
5

Heel counter stiffness

The heel counter offers ample padding and flexibility, making it suitable for those who have Achilles issues. We gave it a rating of 2/5 in our evaluation.

Test results
InfinityRN 4 2
Average 2.9
Compared to 357 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1
Heel counter stiffness
5

nike spectrum SB Continues To Expand Its Line With Their Latest Air Max Stefan Janoski 2 Moc

The decent stability of this shoe, despite its height and cushioned foam, can be attributed to its broad forefoot.

nike spectrum InfinityRN 4 forefoot

Measuring at 118.4 mm, we discovered that it ranks among the widest running shoes we've evaluated in the lab.

nike spectrum infinity rn 4 midsole width in the forefoot 20556050 main
Test results
InfinityRN 4 118.4 mm
Average 114.1 mm
Compared to 395 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
103.3 mm
nike spectrum SB Continues To Expand Its Line With Their Latest Air Max Stefan Janoski 2 Moc
126.9 mm

Midsole width - heel

While the forefoot showcases a wide design, the heel—true to Nike's signature style—doesn't follow suit and is just average. We've accurately measured it at 91.2 mm.

nike spectrum infinity rn 4 midsole width in the heel 20556048 main
Test results
InfinityRN 4 91.2 mm
Average 90.7 mm
Compared to 395 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
73.0 mm
Midsole width - heel
106.6 mm

Flexibility / Stiffness

At the beginning of our lab review, we discussed the dual purpose of the outsole cutouts: to reduce 822675-670 and enhance flexibility. Now, we're diving into the flexibility measurements. During our evaluations, it took just 15.8N of force to flex the shoe to a 90-degree position. 

This indicates that the InfinityRN 4 offers a flexible experience and doubles well as a walking shoe. However, it's essential to understand that this speaks to its longitudinal flexibility, not the torsional aspect.

Test results
InfinityRN 4 15.8N
Average 28.2N
Boys Joggers Nike.
Compared to 377 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
2.2N
Flexibility <> Stiffness
72.1N

Stiffness in cold (%)

Just like our midsole softness evaluation, we tried the same test after urban the shoe in the freezer for 20 minutes.

The outcome was disappointing. The shoe became much stiffer, and we had to exert 27.2N of force to bend it to the same point.

With a 71.6% increase, we're certain you'd feel the difference if you're in a cold-weather region.

Test results
InfinityRN 4 72%
Average 33%
Compared to 377 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
0%
Stiffness in cold
111%

Weight

While they attempted to lighten the load with outsole cutouts, the shoe still tips the scales. Weighing in at 11.1 oz (316g), it's undeniably on the heavier side.

To put things in perspective, the ASICS Superblast Baskets nike spectrum daim kaki.

nike spectrum InfinityRN 4 822675-670
Test results
InfinityRN 4 11.15 oz (316g)
Average 9.38 oz (266g)
Compared to 395 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
5.61 oz (159g)
Weight
12.59 oz (357g)

Breathability

Knit uppers often provide great comfort, but they can come with challenges, particularly when it comes to breathability. We discovered that the nike spectrum InfinityRN 4 falls into this category.

From our smoke-pumping test in the lab, we observed the shoe struggling to release the smoke and gave it a 3/5 score, which indicates it won't perform well in terms of ventilation. We'd advise against using them for hot summer runs.

In a separate light test, we found that very little light passed through the upper, suggesting limited breathability.

It's clear that nike spectrum prioritized comfort with this model. They've employed a thick, stretchy upper that hugs the foot and ensures comfort throughout long runs—just as long as it's not too hot outside!

nike spectrum InfinityRN 4 microscope

Upon closer inspection under our microscope, we noticed a few breathability holes that offer some airflow. Without these, the thick knit design would leave the shoe with almost no breathability at all. Thankfully, there's at least a bit of ventilation.

nike spectrum infinity rn 4 microscope 2 20556116 main

Test results
InfinityRN 4 3
Average 3.8
Compared to 324 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1
Breathability
5

Durability

Toebox durability

While employing a robust Flyknit upper it's a bad idea regarding airflow, its exceptional durability is commendable.

We've found that the InfinityRN 4, with its impressive 4/5 rating, truly shines in our Dremel test when compared to almost any other road running shoe.

nike spectrum infinity rn 4 toebox durability 20556034 main
Test results
InfinityRN 4 4
Average 2.5
Compared to 258 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1
Toebox durability
5

Футболки nike spectrum x stussy&nike spectrum retro

The heel also displays commendable durability, earning a solid 3/5 after facing the Dremel challenge.

We find this to be a good result, surpassing the average and even outperforming many other Nike models.

nike spectrum infinity rn 4 heel padding durability 20556033 main
Test results
InfinityRN 4 3
Average 3.2
Compared to 254 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1
Футболки nike spectrum x stussy&nike spectrum retro
5

Outsole hardness

Nike's priority for this outsole was clear: long-lasting wear, even if it means less grip.

nike spectrum infinity rn 4 outsole 20556121 main
The outsole is designed with numerous cutouts, enhancing both its lightness and flexibility.

With the InfinityRN 4, they've incorporated a 90.4 HC outsole—one of the hardest we've ever measured in our lab.

nike spectrum InfinityRN 4 Outsole hardness
Test results
InfinityRN 4 90.4 HC
Average 79.8 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 375 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
57.0 HC
Outsole hardness
93.0 HC

Outsole durability

The tough rubber nike spectrum uses really shows its strength. After using the Dremel on this shoe for the third and final time, we measured the damage. The indentation was a mere 0.3 mm! 

That's an impressive result. However, because it holds up well against wear, don't anticipate exceptional grip.

nike spectrum infinity rn 4 outsole durability 20556037 main
Test results
InfinityRN 4 0.3 mm
Average 1.0 mm
Compared to 236 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

We're certain that, just like us in our lab, nike spectrum assessed the abrasion resistance of the outsole.

Certainly, they discovered that they didn't need to put on excessive rubber—and subsequently, 822675-670—to ensure longevity. This is evident in their choice to go with a pretty standard thickness of 3.7 mm.

nike spectrum infinity rn 4 outsole thickness 20556035 main
Test results
InfinityRN 4 3.7 mm
Average 3.2 mm
Compared to 392 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
1.0 mm
Outsole thickness
6.0 mm

Misc

Reflective elements

It seems nike spectrum doesn't intend for us to run in these during the nighttime, as there are no reflective elements at all.

nike spectrum InfinityRN 4 Reflective elements
Test results
InfinityRN 4 No

Tongue padding

We measured the tongue's padding at 5.6 mm, finding it to be optimally cushioned. It strikes a balance—it's not too heavy but provides comfort for even the longest runs.

nike spectrum InfinityRN 4 Tongue padding
Test results
InfinityRN 4 5.6 mm
Average 5.8 mm
Compared to 392 running shoes
nike spectrum outburst particle beige ao1069 200 release date info
0.5 mm
Tongue padding
14.2 mm

Tongue: gusset type

With its $160 price tag, we were curious to see if nike spectrum had decided to improve their margins by using a non-gusseted tongue in the shoe. To our relief, we discovered that it has a semi-gusseted design, ensuring a great fit!

nike spectrum InfinityRN 4 Tongue: gusset type
Test results
InfinityRN 4 Both sides (semi)

Heel tab

Thankfully, nike spectrum included a finger-loop heel tab! It's convenient and looks amazing.

nike spectrum InfinityRN 4 Heel tab
Test results
InfinityRN 4 Finger loop

Removable insole

The insole can be taken out without any problem, and we were able to use different orthotics and insoles from other models.

nike spectrum InfinityRN 4 Removable insole
Test results
InfinityRN 4 Yes