Our verdict

If you're looking to break from the mainstream, the PUMA ForeverRun Nitro could be your go-to stability daily trainer. We found that it combines responsive foam, fantastic traction, and superb stability—a trio that's hard to find, all enriched with unique features that set it apart from the competition. Nonetheless, we hold some concerns regarding the outsole's durability and tight forefoot. Moreover, the 10-mm drop might not appeal to every runner out there.

Pros

  • Special insole
  • Exceptional grip
  • Supercritical foam
  • Non-intrusive stability design
  • Packed with innovative features
  • Surprisingly lightweight for its build
  • Comfortable for daily miles
  • Great for heel strikers
  • Awesome tongue

Cons

  • Fast-wearing outsole
  • Low-volume forefoot
  • Risk of heel slippage

Audience verdict

90
Great!

Who should buy

After testing the ForeverRun Nitro both in the lab and on runs, we believe it’s an excellent choice if you:

  • Prefer a well-cushioned and stable daily trainer that feels surprisingly light for its size.
  • Require a stability shoe that offers both bouncy foam and exceptional grip.
  • Don’t wear out outsoles quickly and prefer a high-drop option for daily training, including long runs.

PUMA ForeverRun Nitro

Who should NOT buy

The ForeverRun Nitro from PUMA presents a 10-mm drop that might not appeal to everyone—forefoot strikers, in particular, might find it less than ideal. If this is a concern for you, we suggest exploring alternatives like the Hoka Arahi 7 or the Saucony Guide 17, both of which offer excellent stability without the elevated offset.

Additionally, we've noted that runners who typically see wear in the interior medial part of the midfoot might find the ForeverRun Nitro's outsole problematic. For those encountering this issue often, we recommend the ASICS Gel Kayano 31. This model features ample rubber coverage on the medial side, providing enhanced durability.

PUMA ForeverRun Nitro parts

Cushioning

Heel stack

The heel of this shoe, measuring at 36.1 mm with our calipers, offers substantial cushioning but doesn't reach the heights of a true maximalist shoe.

While it may not seem as groundbreaking compared to earlier years or next to giants like the ASICS Superblast 2, the thick heel still ensures that bottoming out seems nearly impossible for every runner.

PUMA ForeverRun Nitro Heel stack
Test results
ForeverRun Nitro 36.1 mm
Average 34.0 mm
Compared to 355 running shoes
Number of shoes
7.6 mm
Heel stack
46.3 mm

Forefoot stack

Our measurements revealed a forefoot cushioning of 26.6 mm—ample for most needs too. However, midfoot or forefoot strikers on the heavier side may benefit from the more generously cushioned Saucony Hurricane 24, which offers a thicker forefoot padding for enhanced comfort.

PUMA ForeverRun Nitro Forefoot stack
Test results
ForeverRun Nitro 26.1 mm
Average 25.4 mm
Compared to 355 running shoes
Number of shoes
7.6 mm
Forefoot stack
37.1 mm

Drop

PUMA claims that this shoe features a 10-mm offset, and our measurements in the lab confirmed precisely that difference between the heel and the forefoot. This accuracy is a rare instance where the brand hit the mark perfectly!

The 10-mm drop is often viewed as a versatile choice for a daily running shoe, appealing especially to heel strikers, yet versatile enough for various types of runners. And we think it's a good solution for this shoe.

PUMA ForeverRun Nitro Drop
Test results
ForeverRun Nitro 10.0 mm
Average 8.6 mm
Compared to 355 running shoes
Number of shoes
-0.8 mm
Drop
16.1 mm

Midsole softness

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

One distinct advantage of PUMA training shoes over others is the Nitro midsole, which uses nitrogen-infused foam, typically outperforming most training compounds from other brands.

In the ForeverRun Nitro, we discovered a well-balanced foam that isn’t overly plush, a strategic choice for a shoe designed with stability in mind. While softer foams may be tempting, they could lead to an unstable ride.

PUMA ForeverRun Nitro branding

The energy return in this training shoe is great, though not as extraordinary as in other models like the Deviate Nitro Elite 2.

PUMA ForeverRun Nitro Midsole softness
Test results
ForeverRun Nitro 19.1 HA
Average 21.0 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 283 running shoes
Number of shoes
8.5 HA
Midsole softness (soft to firm)
41.5 HA

Midsole softness in cold (%)

After chilling the ForeverRun Nitro in the freezer for 20 minutes, we tested its softness again with our durometer. The results were quite positive, showing only an 18.9% change!

This was expected because Nitro, unlike plain EVA foam, doesn't lose its softness excessively under cold temperatures.

PUMA ForeverRun Nitro Difference in midsole softness in cold
Test results
ForeverRun Nitro 18.9%
Average 25.5%
Compared to 282 running shoes
Number of shoes
0%
Midsole softness in cold
100%

Insole thickness

The insole, produced by a Danish company in a rare collaboration—we'll touch on this later—is slightly thicker than usual at 5.3 mm, enhancing the plush feel underfoot.

PUMA ForeverRun Nitro Insole thickness
Test results
ForeverRun Nitro 5.3 mm
Average 4.5 mm
Compared to 351 running shoes
Number of shoes
1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

PUMA ForeverRun Nitro is true to size (14 votes).

Owners of this shoe, how do you like the size?

Small True to size Large
Compared to 256 running shoes
Number of shoes
Small
True to size
Large

Toebox width - widest part

The fit isn't particularly roomy, but it isn't excessively narrow either.

Our initial measurement at the widest part of the upper showed 97.9 mm—just about average. This felt typical to us during our runs too. However, the shoe’s low-volume upper makes it less suitable for those with larger feet, as demonstrated in the video above.

PUMA ForeverRun Nitro Toebox width at the widest part
Test results
ForeverRun Nitro 97.9 mm
Average 98.5 mm
Compared to 356 running shoes
Number of shoes
89.5 mm
Toebox width - widest part
109.1 mm

Toebox width - big toe

Our second measurement at the big toe area also showed a standard reading of 77.9 mm, indicating a regularly tapered toebox that should fit most runners comfortably.

PUMA ForeverRun Nitro pov
The PWRTAPE reinforcements might resemble band-aids at first glance, but they play a crucial role in adding stability to this shoe.

Of course, don't expect the spacious, foot-shaped design typical of Altra shoes. It's far away from that.

PUMA ForeverRun Nitro Toebox width at the big toe
Test results
ForeverRun Nitro 77.9 mm
Average 78.3 mm
Compared to 230 running shoes
Number of shoes
60.4 mm
Toebox width - big toe
92.5 mm

Stability

Lateral stability test

The ForeverRun Nitro is marketed as a stability shoe, and we agree—it really hits the mark, checking most boxes for modern, non-intrusive stability trainers and even going a step further.

PUMA ForeverRun Nitro RunGuide

We discovered that PUMA employs what they call the RunGuide System, which is essentially a cool way of saying it's a stable shoe without medial posts or other intrusive elements. They achieve this using techniques like the PWRTAPE reinforcements, a hard plastic heel counter and a massive sole flare, which centers the feet and provides an incredibly wide landing base.

Torsional rigidity

We were surprised to discover that from a torsional standpoint, the ForeverRun Nitro is not very stiff, rating only a 3 out of 5, which is less common in stability shoes. This might explain why it felt to us like a daily trainer in terms of comfort, yet still offered excellent stability.

Test results
ForeverRun Nitro 3
Average 3.3
Compared to 334 running shoes
Number of shoes
1
Torsional rigidity
5

Heel counter stiffness

If the previous test surprised us, the second left us truly puzzled. It's quite unusual for us to encounter such a flexible heel counter in a supportive shoe. This 2/5 result clearly indicates that PUMA is intent on doing things differently, diverging from the design approaches of most other brands.

For this reason, this shoe is ideal for runners with sensitive Achilles tendons or those dealing with Haglund's deformity, thanks to its plush and flexible heel area.

Test results
ForeverRun Nitro 2
Average 2.9
Compared to 318 running shoes
Number of shoes
1
Heel counter stiffness
5

Midsole width - forefoot

The enormous dimensions of the ForeverRun Nitro's midsole stand out, particularly with its forefoot measuring a substantial 121.1 mm.

This result is typical in stability shoes and contributes significantly to the shoe's performance. We observed during our runs that the massive size provided a stable landing pad for us, enhancing confidence with each stride and throughout the transition to toe-off.

PUMA ForeverRun Nitro Midsole width in the forefoot
Test results
ForeverRun Nitro 121.3 mm
Average 114.1 mm
Compared to 356 running shoes
Number of shoes
100.5 mm
Midsole width - forefoot
127.9 mm

Midsole width - heel

The ForeverRun Nitro sets itself apart from most modern stability shoes because of its narrow midfoot area. Unlike others, like the Hoka Gaviota 5, which maintain a broad shape throughout, the FRN narrows significantly at the midfoot before the heel expands again, reaching a super wide 101.8 mm in the heel area.

PUMA ForeverRun Nitro Midsole width in the heel
Test results
ForeverRun Nitro 101.8 mm
Average 90.8 mm
Compared to 356 running shoes
Number of shoes
74.9 mm
Midsole width - heel
106.6 mm

Flexibility

Stiffness

We've noted throughout this review that the ForeverRun Nitro often feels more like a neutral daily trainer than a traditional stability shoe, and our findings from the longitudinal stiffness test support this impression.

The shoe yielded a low stiffness result of 22.6N in our 90-degree bend test, reinforcing its suitability for those seeking a comfortable trainer that also serves well for other activities.

Test results
ForeverRun Nitro 22.6N
Average 28.5N
We use an average of four tests. The video shows one of those tests.
Compared to 338 running shoes
Number of shoes
2.2N
Stiffness
94.4N

Stiffness in cold (%)

Nitro performed poorly this time in cold temperatures, becoming 39.5% stiffer during our 90-degree bend test. This is a disappointing result for this oam.

Test results
ForeverRun Nitro 39.5%
Average 33.9%
Compared to 338 running shoes
Number of shoes
0%
Stiffness in cold
148%

Weight

The ForeverRun Nitro may look like a very large shoe and initially gives off a heavy-duty impression.

However, once we placed it on our scale and took it for a run, it proved to be surprisingly lighter than it appears. Weighing in at just 9.7 oz or 274g, PUMA has impressively managed to shave significant weight off this model, keeping it below the 10-oz benchmark!

PUMA ForeverRun Nitro Weight
Test results
ForeverRun Nitro 9.67 oz (274g)
Average 9.38 oz (266g)
Compared to 356 running shoes
Number of shoes
5.26 oz (149g)
Weight
12.59 oz (357g)

Breathability

One thing we honestly appreciate about PUMA—and this review will highlight this frequently—is their disregard for conventional trends, crafting shoes that truly stand out. The ForeverRun Nitro's mesh upper, with its unique design, exemplifies this approach.

Concerned about how the comfort-oriented, padded minipods in the forefoot might affect breathability, we initiated our testing with the smoke machine. We were pleased to discover a rating of 4/5!

Illuminating the upper revealed the detailed mesh minipods and the supporting PWRTAPE reinforcements more clearly. But rest assured, these features did not hinder heat and moisture evacuation enough.

PUMA ForeverRun Nitro microscope

PUMA has cleverly spaced the pods to ensure adequate air circulation, a fact we confirmed under our microscope. It's impressive to witness such precision in manufacturing.

PUMA ForeverRun Nitro microscope 2

The upper of this PUMA is intentionally crafted without extensive cushioning. This suggests a focus on weight reduction, potentially catering to users who prioritize lightweight, thinner uppers.

Another nice feature of this shoe is the perforated PWRTAPE reinforcements on the upper. These enhancements ensure breathability without sacrificing support, and we absolutely love it.

PUMA ForeverRun Nitro reinforcements

Test results
ForeverRun Nitro 4
Average 3.8
Compared to 285 running shoes
Number of shoes
1
Breathability
5

Durability

Toebox durability

In theory, the tufted pods on the ForeverRun Nitro should also enhance its durability. To test this, we fired up our Dremel, ready to destroy yet another upper here in the lab!

The initial results were quite promising. While a 3/5 may not seem spectacular, it's definitely a positive outcome for any road running shoe. This further confirms that PUMA's unique design not only looks good but will endure over time.

PUMA ForeverRun Nitro Toebox durability
Test results
ForeverRun Nitro 3
Average 2.5
Compared to 219 running shoes
Number of shoes
1
Toebox durability
5

Heel padding durability

Unfortunately, the heel padding was a disappointment, and we also noticed some minor heel slippage—this could become a significant concern for many runners. We recommend wearing your most cushioned, high-grip socks to mitigate this issue.

We also discovered that the Dremel inflicted more damage than anticipated, leading us to rate it a disappointing 2/5—a score that might raise some eyebrows.

PUMA ForeverRun Nitro Heel padding durability
Test results
ForeverRun Nitro 2
Average 3.2
Compared to 215 running shoes
Number of shoes
1
Heel padding durability
5

Outsole hardness

The stakes were high for the outsole because, in recent years, PUMAGRIP has secured its reputation as one of the top-tier rubber compounds in the market, alongside heavy-hitters like Vibram and Continental.

PUMA ForeverRun Nitro lugs

And indeed, the outsole did not disappoint when it came to grip—it was exceptionally effective in both dry and wet conditions, providing robust traction across various surfaces, reminiscent of our experiences with other PUMA models like the Deviate Nitro 3.

PUMA ForeverRun Nitro outsole coverage
Rubber coverage is impressive compared to other shoes, though the ample exposed foam on the inner medial side is unusual for a stability shoe.

The outsole design appears to be highly engineered, perhaps to the point of being overly complex. It blends small voids with mini-lugs that seem inspired by a puma's fingerprint and come in various shapes. Additionally, the brand's logo adorns the heel.

Finally, were also surprised to find the durometer reading slightly lower than anticipated at 75.3 HC, which might impact its durability.

PUMA ForeverRun Nitro Outsole hardness
Test results
ForeverRun Nitro 75.3 HC
Average 80.1 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 336 running shoes
Number of shoes
52.1 HC
Outsole hardness
93.0 HC

Outsole durability

While the outsole clings like puma claws, its durability falls short.

In our Dremel test, we observed 1.8 mm of damage—nearly double the average we usually see, which is somewhat disappointing for a PUMAGRIP rubber, albeit expected given its hardness rating.

PUMA ForeverRun Nitro Outsole durability
Test results
ForeverRun Nitro 1.8 mm
Average 1.0 mm
Compared to 197 running shoes
Number of shoes
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

Of course, PUMA was aware of this. That's why they applied a hefty 4.5 mm of rubber instead of the standard three-ish millimeters we typically measure in the lab.

PUMA ForeverRun Nitro PUMAGRIP

In other words—we proved that they aim to offset the below-average durability with extra-thick rubber, striving to strike a balance between exceptional grip and reduced longevity.

PUMA ForeverRun Nitro Outsole thickness
Test results
ForeverRun Nitro 4.5 mm
Average 3.2 mm
Compared to 355 running shoes
Number of shoes
0.0 mm
Outsole thickness
6.6 mm

Misc

Price

We believe the ForeverRun Nitro is reasonably priced—while it's not an outstanding bargain, it certainly holds value. For a well-cushioned stability trainer with superior build quality and good quality materials, we feel that we certainly can't voice any complaints to PUMA at all.

Test results
ForeverRun Nitro $150
Average $146
Compared to 356 running shoes
Number of shoes
$60
Price
$300

Reflective elements

Not many daily trainers feature reflective elements, but we discovered that the ForeverRun Nitro includes a few. They aren't the most eye-catching we've tested, yet they still provide some added safety for you.

Test results
ForeverRun Nitro Yes

Tongue padding

The tongue in this shoe strikes a perfect balance between comfort and weight. PUMA took a clever approach, as they added just a 5.3 mm pad to protect the instep, while keeping the rest of the tongue thin and streamlined, which significantly cuts down on weight.

PUMA ForeverRun Nitro dual tongue loop
The lacing system excels with a PWRTAPE reinforcement at the first eyelet, improving support. It also features a rare dual tongue loop.

This design doesn't offer the plush comfort of pillow-like tongues, but it's a trade-off that pays off by saving weight and still providing sufficient protection. We think it's a smart choice if you're looking for a more dynamic shoe.

PUMA ForeverRun Nitro Tongue padding
Test results
ForeverRun Nitro 5.3 mm
Average 5.8 mm
Compared to 353 running shoes
Number of shoes
0.5 mm
Tongue padding
14.2 mm

Tongue: gusset type

The tongue is semi-gusseted, meaning it's partially attached to the sides—our preferred setup for daily trainers. We're happy to see that PUMA didn't skimp on quality here, especially since it's common for some brands to cut corners on this often-overlooked feature to save a few cents per shoe.

PUMA ForeverRun Nitro Tongue: gusset type
Test results
ForeverRun Nitro Both sides (semi)

Heel tab

The ForeverRun Nitro features a horizontal finger-loop heel tab, which we didn't particularly like. It seems overly large and not built to last. However, it does provide a handy grip—just be gentle when pulling on it.

PUMA ForeverRun Nitro Heel tab
Test results
ForeverRun Nitro Finger loop

Removable insole

The insole is not made by PUMA but by the Danish company Kaiser Sport & Ortopædi. Although it's replaceable, doing so means losing one of the shoe’s unique features—the small built-in metatarsal pad.

PUMA ForeverRun Nitro Removable insole
Test results
ForeverRun Nitro Yes