Nuestra conclusión

The Under Armour Surge 4 proved in our lab to deliver solid value at its incredibly low price, though performance takes a hit with very low energy return and modest shock absorption. Still, for budget-minded runners, it’s a stable option with a durable outsole, making it suitable for beginners.

Pros

  • Good traction
  • Very affordable price
  • Stable and secure ride
  • Ideal for heel strikers
  • Comfortable heel and tongue
  • Suitable for daily wear
  • Pressure-free lacing system
  • Durable outsole

Contras

  • Very low energy return
  • Weak shock absorption
  • Not for serious running
  • Firm feel underfoot

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Who should buy

The Under Armour Surge 4 can be a solid choice for:

  • Casual runners on a budget seeking a stable daily trainer for easy runs or jogs.
  • Runners who prefer firm cushioning, focus on shorter distances, and want maximum savings.
  • Heel strikers looking for a cheap shoe with a thick outsole for extra durability.

Under Armour Surge 4

Who should NOT buy

We believe the Surge 4 is not the best choice if you want decent performance in energy return or shock absorption. After lab testing, we found both categories fell really short, ranking among the weakest we’ve measured. For a budget-friendly alternative with better bounce, we suggest the Nike Downshifter 12.

We also think the Surge 4 feels overly firm underfoot, which can be uncomfortable for many runners. If you prefer a softer and more forgiving ride but still want an affordable shoe, we recommend the New Balance Fresh Foam Arishi v4 or the Brooks Revel 7. However, don't expect a plush feel—that's impossible at a super-low price point.

Under Armour Surge 4 parts

Amortiguación

Shock absorption

Nuevo

Shock absorption is well below average at 114 SA in the heel and 84 SA in the forefoot, which isn’t surprising given the low price, the basic foam compound, and the moderate stack height.

Under Armour Surge 4 Shock absorption heel
Talón
Antepié
Resultados de las pruebas
Surge 4 114 SA
Media 128 SA
En comparación con 267 zapatillas de running para asfalto
Número de zapatillas
52 SA
Absorción de impactos
170 SA

Energy return

Nuevo

At the time of this review (we can’t predict the future yet), the Surge 4 ranks among the three shoes with the lowest energy return we tested... and we’ve tested hundreds! It scored only 42.4% in the heel and a shockingly flat 39.2% in the forefoot.

This has a crystal-clear message: if you enjoy even a hint of bounce in your running shoes, this one delivers the opposite feel.

Talón
Antepié
Resultados de las pruebas
Surge 4 42.4%
Media 58.4%
En comparación con 264 zapatillas de running para asfalto
Número de zapatillas
38.0%
Retorno de energía
82.0%

Altura de la suela en la zona del talón

The stack height isn’t low at all, despite what the shock absorption results might suggest. At 33.5 mm, it’s close to the average and offers a solid layer of foam underfoot.

Under Armour Surge 4 Heel stack
Resultados de las pruebas
Surge 4 33.5 mm
Media 34.6 mm
En comparación con 459 zapatillas de running para asfalto
Número de zapatillas
22.5 mm
Altura de la suela en la zona del talón
48.1 mm

Altura de la suela en el antepié

The forefoot follows the same trend, with 24.5 mm of stack height, slightly below today’s average. The shoe feels pretty normal in this regard.

Under Armour Surge 4 Forefoot stack
Resultados de las pruebas
Surge 4 24.5 mm
Media 26.0 mm
En comparación con 459 zapatillas de running para asfalto
Número de zapatillas
13.7 mm
Altura de la suela en el antepié
38.5 mm

Drop

We measured an actual heel-to-toe drop of 9.0 mm, which works great for heel strikers but is still usable for nearly any footstrike. This isn’t surprising, as most budget shoes favor higher-drop designs.

Under Armour Surge 4 Drop
Resultados de las pruebas
Surge 4 9.0 mm
Media 8.6 mm
En comparación con 459 zapatillas de running para asfalto
Número de zapatillas
-0.2 mm
Drop
16.1 mm

Suavidad de la mediasuela

When we tested the Surge 4 on our runs, we instantly discovered a firm feel underfoot that's even more noticeable by today’s softer-foam trend.

Our lab confirmed this sensation with a 26.0 HA reading. Still, firmer midsoles can be useful for beginners or casual runners who want a simple option with a stable, no-nonsense ride.

Under Armour Surge 4 Midsole softness
Resultados de las pruebas
Surge 4 26.0 HA
Media 20.6 HA
Utilizamos la media de cuatro pruebas. La foto muestra una de esas pruebas.
En comparación con 385 zapatillas de running para asfalto
Número de zapatillas
5.9 HA
Suavidad de la mediasuela (de blanda a firme)
36.1 HA

Rocker

The rocker design of the Surge 4 leans more toward heel strikers, as its curvature clearly favors rearfoot landings. The forefoot rocker is also very mild, something we usually see in budget-friendly shoes.

Under Armour Surge 4 Rocker

Tallaje y ajuste

Talla

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Anchura / Ajuste

We made a gel mold of the Surge 4’s interior to analyze its shape.

Our measurement of the upper’s widest section came to 98.5 mm, ranking it among the widest daily trainers in its category.

Under Armour Surge 4 Width / Fit
Resultados de las pruebas
Surge 4 98.5 mm
Media 95.2 mm
En comparación con 214 zapatillas de running para asfalto
Número de zapatillas
88.5 mm
Anchura / Ajuste
101.1 mm

Anchura de la parte delantera

In contrast, the toebox narrows to a more average 73.2 mm. This classic taper limits space, though it’s worth noting that UA offers a wide version in some markets, which helps considerably.

Under Armour Surge 4 Toebox width
Resultados de las pruebas
Surge 4 73.2 mm
Media 73.3 mm
En comparación con 214 zapatillas de running para asfalto
Número de zapatillas
66.7 mm
Anchura de la parte delantera
82.4 mm

Altura de la parte delantera

While the Surge 4 provides solid width, its vertical space is another matter.

Measuring 24.5 mm, we found it to be a low-volume design, so runners with higher-volume feet may need to be cautious here.

Under Armour Surge 4 Toebox height
Resultados de las pruebas
Surge 4 24.5 mm
Media 27.1 mm
En comparación con 213 zapatillas de running para asfalto
Número de zapatillas
22.0 mm
Altura de la parte delantera
34.1 mm

Tracción / Agarre

Traction test

Nuevo

One of the strongest features we discovered in the Surge 4 is traction. With a 0.53 score in our demanding wet test over concrete, it shows a confidence-boosting grip that even outperforms many shoes costing 3x more!

Resultados de las pruebas
Surge 4 0.53
Media 0.47
En comparación con 258 zapatillas de running para asfalto
Número de zapatillas
0.11
Tracción en el antepié
0.83

Diseño de la suela exterior

Nuevo

The outsole of the Surge 4 features broad rubber coverage with a small section of exposed foam at the center. Large oval and rectangular rubber patches strengthen the heel and midfoot, adding structure where impact is highest.

Up front, the forefoot showcases a combination of rounded-cornered rectangular strips and small circular pods arranged in rows. We believe that this detailed layout feels surprisingly advanced for the shoe’s price, highlighting the outsole as its most refined element.

Under Armour Surge 4 Outsole design

Flexibilidad / Rigidez

This shoe is not very flexible, as our 30-degree bend test confirmed with a result of 15.4N, landing right around the average.

Under Armour Surge 4 Flexibility / Stiffness
Resultados de las pruebas
Surge 4 15.4N
Media 15.1N
En comparación con 261 zapatillas de running para asfalto
Número de zapatillas
4.0N
Flexibilidad <> Rigidez
28.5N

Peso

At 10.4 oz (295g), the Surge 4’s weight isn’t too bad, especially given its solid outsole coverage. And honestly, we can’t expect a shoe at this low price to pack multiple advanced features or to be super lightweight.

Under Armour Surge 4 Weight
Resultados de las pruebas
Surge 4 10.4 oz (295g)
Media 9.3 oz (265g)
En comparación con 460 zapatillas de running para asfalto
Número de zapatillas
5.3 oz (149g)
Peso
12.9 oz (366g)

Transpirabilidad

The step-in feel of the Surge 4 is solid, thanks to generous padding in the heel and tongue. The toebox, however, feels less pleasant and doesn’t look especially airy.

We tested ventilation with our smoke machine and saw moderate airflow. It wasn’t impressive but not poor either, so we rated it 3/5.

The upper relies on synthetic fibers that aren’t particularly plush or gentle.

Under Armour Surge 4 microscope

For this reason, going sockless is out of the question. On the plus side, they add extra lateral stability.

Yet in our view, the decent ventilation and the comfortable heel and tongue padding are right in line with expectations. We just wished the mesh felt a bit softer.

Resultados de las pruebas
Surge 4 3
Media 3.7
En comparación con 389 zapatillas de running para asfalto
Número de zapatillas
1
Transpirabilidad
5

Estabilidad

Prueba de estabilidad lateral

Stability in the Surge 4 is surprisingly good, and we think runners with mild pronation might find it secure underfoot. The lateral TPU heel inserts and wide landing base work together to create a really solid support.

Rigidez torsional

The Surge 4 is fairly stiff, scoring 4/5 in our flexibility test, which clearly adds to the stable ride. However, runners who enjoy a more flexible shoe for daily use may prefer another option.

Resultados de las pruebas
Surge 4 4
Media 3.5
En comparación con 438 zapatillas de running para asfalto
Número de zapatillas
1
Rigidez torsional
5

Rigidez del contrafuerte del talón

Under Armour kept things simple with the Surge 4, giving it a standard heel counter similar to what we see in many daily trainers, even pricier ones. In our test, it earned a 3/5 score.

Resultados de las pruebas
Surge 4 3
Media 2.9
En comparación con 422 zapatillas de running para asfalto
Número de zapatillas
1
Rigidez del contrafuerte del talón
5

Anchura de la mediasuela - antepié

The Surge 4 comes with a standard forefoot shape and width, providing a landing base of 116.3 mm at its widest point.

Under Armour Surge 4 Midsole width - forefoot
Resultados de las pruebas
Surge 4 116.3 mm
Media 114.3 mm
En comparación con 460 zapatillas de running para asfalto
Número de zapatillas
100.8 mm
Anchura de la mediasuela - antepié
126.9 mm

Anchura de la mediasuela - talón

It’s clear to us that the Surge 4 leans more toward heel strikers, which makes sense to us. Budget-friendly shoes are often aimed at beginners, and many in this group land on the rearfoot.

At the same time, this measurement of 94.8 mm reflects a new trend in the market. Entry-level models were once compact, but now we see them adopting wider, stiffer builds as well.

Under Armour Surge 4 Midsole width - heel
Resultados de las pruebas
Surge 4 94.8 mm
Media 90.8 mm
En comparación con 460 zapatillas de running para asfalto
Número de zapatillas
70.8 mm
Anchura de la mediasuela - talón
106.6 mm

Durabilidad

Durabilidad de la parte delantera

Toebox durability isn’t the strongest aspect of the Surge 4, as our 2/5 toebox score shows. It delivers only modest resistance to abrasion, falling short of more durable options. To be honest with you, we expected a better result here.

Resultados de las pruebas
Surge 4 2
Media 2.6
En comparación con 323 zapatillas de running para asfalto
Número de zapatillas
1
Durabilidad de la parte delantera
5

Durabilidad del acolchado del talón

The heel padding also scored below average at 3/5, which isn’t great news. Still, given the shoe’s low price, some trade-offs in quality are expected, and this seems to be one of them.

Resultados de las pruebas
Surge 4 3
Media 3.3
En comparación con 317 zapatillas de running para asfalto
Número de zapatillas
1
Durabilidad del acolchado del talón
5

Durabilidad de la suela

If the upper isn’t a major concern, then the Surge 4 holds up well. Its outsole performed solidly in our last Dremel test, showing just 0.9 mm of rubber wear.

Resultados de las pruebas
Surge 4 0.9 mm
Media 1.0 mm
En comparación con 301 zapatillas de running para asfalto
Número de zapatillas
0.0 mm
Desgaste de la suela
2.0 mm

Grosor de la suela

You know, there's a funny paradox in running shoes: buyers of cheap models often expect more durability than those paying 3x or 4x the price.

Under Armour Surge 4 rubber

That’s why brands emphasize long-lasting builds in cheap shoes, even if it means more weight. And that’s exactly what we found here, with the Surge 4 showing an extra-durable 4.5 mm outsole.

Under Armour Surge 4 Outsole thickness
Resultados de las pruebas
Surge 4 4.5 mm
Media 3.2 mm
En comparación con 456 zapatillas de running para asfalto
Número de zapatillas
0.9 mm
Grosor de la suela
6.1 mm

Varios

Grosor de la plantilla

The stock insole of the Surge 4 measures 3.9 mm in thickness.

Under Armour Surge 4 Insole thickness
Resultados de las pruebas
Surge 4 3.9 mm
Media 4.5 mm
En comparación con 455 zapatillas de running para asfalto
Número de zapatillas
1.5 mm
Grosor de la plantilla
7.8 mm

Plantilla extraíble

The insole of the Surge 4 is removable, allowing you to swap in a thicker, more cushioned option or even custom orthotics. As for the “Comfort Deluxe System” name... let’s just say it feels a bit exaggerated.

Under Armour Surge 4 Removable insole
Resultados de las pruebas
Surge 4

Rigidez de la mediasuela en frío (%)

The EVA midsole of the Surge 4 became only 12% firmer after 20 minutes in our freezer. That's a pleasantly unexpected result that helps maintain consistent performance year-round.

Under Armour Surge 4 Midsole softness in cold (%)
Resultados de las pruebas
Surge 4 12%
Media 25%
En comparación con 384 zapatillas de running para asfalto
Número de zapatillas
1%
Rigidez de la mediasuela en frío
63%

Elementos reflectantes

The Surge 4 has no reflective elements, so night runners may find this a bit of an issue and should rely on hi-vis clothing or accessories for visibility.

Under Armour Surge 4 Reflective elements
Resultados de las pruebas
Surge 4 No

Acolchado de la lengüeta

The lacing system on the Surge 4 is unusual for a budget shoe—it skips basic punched eyelets and instead uses stitched fabric loops. However, it lacks an extra top eyelet, limiting advanced heel-lock lacing options.

Under Armour Surge 4 lacing

A usual trick from brands on cheap shoes is to add a bunch of foam to the tongue in order to improve comfort by just spending a few cents, and that's what Under Armour did by using a thick 7.8 mm tongue.

Under Armour Surge 4 Tongue padding
Resultados de las pruebas
Surge 4 7.8 mm
Media 5.9 mm
En comparación con 457 zapatillas de running para asfalto
Número de zapatillas
0.4 mm
Acolchado de la lengüeta
14.2 mm

Lengüeta: tipo de refuerzo

The tongue isn’t gusseted, so it isn’t attached to the sides and may move slightly. This is completely expected for a budget-friendly running shoe.

Under Armour Surge 4 Tongue: gusset type
Resultados de las pruebas
Surge 4 Ninguno

Precio

The main appeal of the Surge 4 is clearly its low price. Positioned at the very bottom of the price spectrum, it targets runners seeking maximum value while spending as little as possible.

Resultados de las pruebas
Surge 4 $65
En comparación con 460 zapatillas de running para asfalto
Número de zapatillas
€50
Precio
€310

Tirador del talón

The minimal design of the Surge 4 extends to the rear, where it completely skips a heel tab.

Under Armour Surge 4 Heel tab
Resultados de las pruebas
Surge 4 Ninguno