Our verdict

The mens nike air pegasus sd 83 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.

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  • Generously cushioned
  • Excellent for easy runs
  • Feels like running on clouds
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womens nike 1 tens shoes clearance sale Cons

  • Average-at-best breathability
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  • Sizes run notably small

Audience verdict

85
Good!

Who should buy

The mens nike air pegasus sd 83 gets our seal of approval for:

  • Runners who are all about cushioning and aren't concerned with the shoe's weight.
  • Marathoners looking for a comfortable pair for easy or moderate runs.
  • Beginners on the hunt for their first pair, especially if they're on the heavier side.

mens nike air pegasus sd 83

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 Invincible 3 offers a similar concept and design, but with a full ZoomX midsole.

Runners who prefer lightweight 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 ASICS Cumulus 25 or the New Balance Fresh Foam X 1080 v12, both of which deliver similar features in a lighter package.

mens nike air pegasus sd 83 parts

Cushioning

Heel stack

Given its weight, 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'."

mens nike air pegasus sd 83 Heel stack
Test results
InfinityRN 4 34.2 mm
Average 34.2 mm
Compared to 403 running shoes
nike air with grey cheetah print background check
22.5 mm
Heel stack
46.3 mm

Forefoot stack

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nike infinity rn 4 forefoot 20556124 main

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

mens nike air pegasus sd 83 Forefoot stack
Test results
InfinityRN 4 24.4 mm
Average 25.6 mm
Compared to 403 running shoes
nike air with grey cheetah print background check
13.7 mm
Forefoot stack
37.1 mm

Drop

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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 Hoka Clifton 9.

nike infinity rn 4 drop 20556046 main
Test results
InfinityRN 4 9.8 mm
Average 8.6 mm
Compared to 403 running shoes
nike air with grey cheetah print background check
-0.2 mm
Drop
16.1 mm

womens nike 1 tens shoes clearance sale | 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 React Infinity Run Flyknit 3—apart from its shorter name—is the foam. After six years, Nike 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 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.

mens nike air pegasus sd 83 Midsole softness
Test results
InfinityRN 4 12.5 HA
Average 20.9 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 330 running shoes
nike air with grey cheetah print background check
8.5 HA
Midsole softness (soft to firm)
35.0 HA

Midsole softness in cold (%)

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 TPE and EVA. starry sky grey nike roshe black blue dress meme doesn't hold up well in cold temperatures.

mens nike air pegasus sd 83 Midsole softness in cold
Test results
InfinityRN 4 52%
Average 25%
Compared to 330 running shoes
nike air with grey cheetah print background check
0%
Midsole softness in cold
63%

womens nike 1 tens shoes clearance sale | 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 made a great call here.

nike infinity rn 4 insole thickness 20556045 main
Test results
InfinityRN 4 3.1 mm
Average 4.4 mm
Compared to 399 running shoes
nike air with grey cheetah print background check
1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

mens nike air pegasus sd 83 is half size small (450 votes).

Owners of this shoe, how does this shoe fit?

1 size small ½ size small True to size ½ size large 1 size large
Compared to 382 running shoes
nike air with grey cheetah print background check
½ size small
Slightly small
True to size
Slightly large
½ size large

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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 infinity rn 4 toebox width widest part 22460051 main
Test results
InfinityRN 4 95.3 mm
Average 95.5 mm
Compared to 158 running shoes
nike air with grey cheetah print background check
88.5 mm
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102.4 mm

Toebox width - big toe

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

mens nike air pegasus sd 83 Toebox width - big toe
Test results
InfinityRN 4 74.1 mm
Average 73.7 mm
Compared to 158 running shoes
nike air with grey cheetah print background check
66.7 mm
Toebox width - big toe
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.

mens nike air pegasus sd 83 Toebox height
Test results
InfinityRN 4 22.4 mm
Average 27.1 mm
Compared to 157 running shoes
nike air with grey cheetah print background check
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 nike lunar montreal weight gain women.

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 nike lebron 14 agimat price in pakistan india live.

Test results
InfinityRN 4 3
Average 3.4
Compared to 382 running shoes
nike air with grey cheetah print background check
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 366 running shoes
nike air with grey cheetah print background check
1
Heel counter stiffness
5

Midsole width - forefoot

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

nike infinity rn 4 forefoot 2 20556128 main

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

mens nike air pegasus sd 83 Midsole width in the forefoot
Test results
InfinityRN 4 118.4 mm
Average 114.1 mm
Compared to 404 running shoes
nike air with grey cheetah print background check
102.2 mm
Midsole width - forefoot
126.9 mm

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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.

mens nike air pegasus sd 83 Midsole width in the heel
Test results
InfinityRN 4 91.2 mm
Average 90.6 mm
Compared to 404 running shoes
nike air with grey cheetah print background check
70.8 mm
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106.6 mm

Flexibility / Stiffness

At the beginning of our lab review, we discussed the dual purpose of the outsole cutouts: to reduce weight and enhance flexibility. Now, we're diving into the flexibility measurements. During our evaluations, it took 14.8N of force to flex the shoe to a 30-degree position. 

To be honest, we expected a bit more from the outsole cutouts, as they only brought the InfinityRN 4 to an average stiffness level, and it would’ve been great to see even less rigidity for a smoother feel.

mens nike air pegasus sd 83 Flexibility / Stiffness
Test results
InfinityRN 4 14.8N
Average 15.6N
Compared to 124 running shoes
nike air with grey cheetah print background check
4.6N
Flexibility <> Stiffness
28.5N

Stiffness in cold (%)

Just like our midsole softness evaluation, we tried the same test after leaving 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 32%
Compared to 383 running shoes
nike air with grey cheetah print background check
0%
Stiffness in cold
101%

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 nike free trainer white and grey blue background.

mens nike air pegasus sd 83 Weight
Test results
InfinityRN 4 11.15 oz (316g)
Average 9.38 oz (266g)
Compared to 404 running shoes
nike air with grey cheetah print background check
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 mens nike air pegasus sd 83 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 prioritised 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 infinity rn 4 microscope 20556115 main

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.

mens nike air pegasus sd 83 microscope 2

Test results
InfinityRN 4 3
Average 3.8
Compared to 333 running shoes
nike air with grey cheetah print background check
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 infinity rn 4 toebox durability 20556034 main
Test results
InfinityRN 4 4
Average 2.6
Compared to 267 running shoes
nike air with grey cheetah print background check
1
Toebox durability
5

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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.

mens nike air pegasus sd 83 nike sneakers in kickstreamtv boots made in mexico
Test results
InfinityRN 4 3
Average 3.2
Compared to 262 running shoes
nike air with grey cheetah print background check
1
nike sneakers in kickstreamtv boots made in mexico
5

Outsole hardness

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

mens nike air pegasus sd 83 outsole
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 infinity rn 4 outsole hardness 20556036 main
Test results
InfinityRN 4 90.4 HC
Average 79.7 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 384 running shoes
nike air with grey cheetah print background check
56.1 HC
Outsole hardness
93.0 HC

Outsole durability

The tough rubber Nike 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.

mens nike air pegasus sd 83 Outsole durability
Test results
InfinityRN 4 0.3 mm
Average 1.1 mm
Compared to 245 running shoes
nike air with grey cheetah print background check
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

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

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

mens nike air pegasus sd 83 Outsole thickness
Test results
InfinityRN 4 3.7 mm
Average 3.2 mm
Compared to 401 running shoes
nike air with grey cheetah print background check
1.0 mm
Outsole thickness
6.0 mm

Misc

Reflective elements

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

mens nike air pegasus sd 83 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 infinity rn 4 tongue padding 20556056 main
Test results
InfinityRN 4 5.6 mm
Average 5.8 mm
Compared to 401 running shoes
nike air with grey cheetah print background check
0.4 mm
Tongue padding
14.2 mm

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With its £160 price tag, we were curious to see if Nike 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!

mens nike air pegasus sd 83 nike sb high blackout black screen door repair
Test results
InfinityRN 4 Both sides (semi)

Heel tab

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

mens nike air pegasus sd 83 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 infinity rn 4 removable insole 20556057 main
Test results
InfinityRN 4 Yes