Our verdict

Our extensive trials with the Salomon SMax 2P Sock Ld21 GTX revealed it as an exceptional iteration of this saga, maintaining the core attributes of agility, durability, cushioning, and superior grip of its predecessor. We discovered that the Gore-Tex membrane's incorporation does add slightly to the shoe's weight and price, yet it offers significant benefits when we're tackling wet terrains, dealing with frequent rain, or encountering moist conditions.

Footwear SALOMON Impulse W 415985 White Rainy Day Purple Heather Pros

  • zapatillas de trekking Salomon talla 40.5 verdes más de 100
  • tenis salomon techamphibian 4 preto castanho mulher
  • Orange sneakers and shoes Salomon
  • Жіночі трекінгові кросівки salomon xa pro 3d
  • Salomon Zapatillas Trail Running Alphacross 4
  • Remarkable durability
  • Ideal for heel strikers

Footwear SALOMON Impulse W 415985 White Rainy Day Purple Heather Cons

  • Completely lacks breathability
  • Midsole could feel overly firm for some
  • Exceptionally heavy
  • Кросівки трекінгові жіночі salomon goretex 36 розмір

Who should buy

We believe the Salomon SMax 2P Sock Ld21 GTX is an excellent pick for:

  • Trail enthusiasts in search of great grip and reliably dry feet when tackling wet conditions.
  • горные лыжи Salomon.
  • Adventurers tackling technical trails and river crossings, needing a Gore-Tex shoe that endures long distances.

Salomon SMax 2P Sock Ld21 GTX

Footwear SALOMON Impulse W 415985 White Rainy Day Purple Heather | Who should NOT buy

If your primary activities are walking or hiking rather than running, we suggest considering a GoreTex hiking boot/shoe over the Speedcross 6 GTX. Options like the Hoka Anacapa Mid GTX for a taller boot with fantastic cushioning or the zapatillas de running Salomon constitución ligera 10k talla 35 Yves Salomon Płaszcze wełniane.

For those who don't frequently encounter cold temperatures or water, the Salomon SMax 2P Sock Ld21 GTX may not be the ideal choice. Its Gore-Tex membrane, while great for waterproofing, offers zero breathability as we found out in the lab.

Salomon SMax 2P Sock Ld21 GTX

In such cases, we think that a fairly priced alternative with excellent grip, such as the Merrell Nova 3, zapatillas de running Salomon trail constitución ligera ritmo bajo verdes.

Cushioning

Heel stack

Salomon X-Scream 3D Womens.

Salomon SMax 2P Sock Ld21 GTX heel

This way Salomon ensures that all heel strikers, even the heaviest, have ample cushioning underfoot with the Speedcross 6.

Salomon SMax 2P Sock Ld21 GTX Heel stack
Test results
Speedcross 6 GTX 37.0 mm
Average 31.9 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
19.6 mm
Heel stack
42.4 mm

Footwear SALOMON Impulse W 415985 White Rainy Day Purple Heather | Forefoot stack

We conducted another precise measurement in the forefoot with our caliper and discovered a total stack height of 25.8 mm.

This level of cushioning is more than adequate to maintain comfort during even the longest adventures.

Salomon SMax 2P Sock Ld21 GTX Forefoot stack
Test results
Speedcross 6 GTX 25.8 mm
Average 24.5 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
13.4 mm
Forefoot stack
33.9 mm

Drop

The substantial 11.2-mm heel-to-toe drop clearly positions this shoe as ideal for rearfoot strikers and those who often experience calf or Achilles issues. Its wedge-shaped design effectively unloads stress from these areas.

Salomon SMax 2P Sock Ld21 GTX Drop
Test results
Speedcross 6 GTX 11.2 mm
Average 7.5 mm
Compared to 136 trail running shoes
Salomon Jordi Saragossa
-0.1 mm
Drop
17.3 mm

Midsole softness

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

If you're a fan of firm midsoles, the EnergyCell foam of the Speedcross 6 will be right up your alley. However, for others, it might feel as hard as concrete.

We noticed its firmness during all of our test runs and confirmed this with a durometer test in the lab. We recorded a 32.4 HA result, indicating that it's indeed designed for those who prefer a traditional, stable feel underfoot.

Salomon SMax 2P Sock Ld21 GTX Midsole softness
Test results
Speedcross 6 GTX 32.4 HA
Average 22.6 HA
Light pink drawstring waist jacket from YVES SALOMON.
Compared to 113 trail running shoes
Salomon Jordi Saragossa
9.1 HA
Midsole softness (soft to firm)
39.0 HA

Midsole softness in cold

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

To assess the shoe's performance in cold temperatures, we placed it in our freezer for 20 minutes and Cross retested it with the durometer. After this cold test, the shoe registered at 35.8 HA.

Salomon SMax 2P Sock Ld21 GTX Midsole softness in cold
Test results
Speedcross 6 GTX 35.8 HA
Average 28.1 HA
Compared to 113 trail running shoes
Salomon Jordi Saragossa
11.8 HA
Midsole softness in cold (soft to firm)
48.4 HA

Midsole softness in cold (%)

That's just a 10.4% difference between freezing and normal temperatures—a fantastic performance! It ensures the foam maintains a consistent feel, regardless of how cold or hot it is outside.

Test results
Speedcross 6 GTX 10%
Average 26%
Compared to 113 trail running shoes
Salomon Jordi Saragossa
5%
Midsole softness in cold
68%

Insole thickness

The insole, at 6.6 mm, is slightly slimmer than its non-GTX counterpart, likely an effort by Salomon to shave off a bit of weight. And we think that going for an even thinner one would be the right call in this shoe.

Salomon SMax 2P Sock Ld21 GTX Insole thickness
Test results
Speedcross 6 GTX 6.6 mm
Average 4.7 mm
Compared to 135 trail running shoes
Salomon Jordi Saragossa
2.1 mm
Insole thickness
7.9 mm

Size and fit

Size

Salomon SMax 2P Sock Ld21 GTX is true to size (85 votes).

Copa suau salomon?

1 size small ½ size small True to size ½ size large 1 size large
Compared to 121 trail running shoes
Salomon Jordi Saragossa
½ size small
Slightly small
True to size
Slightly large
½ size large

modelos trail de Salomon

To evaluate the fit, we created a precise gel mold of the toebox for accurate comparison with other shoes.

After measuring the mold, we discovered that the widest part of the upper measured 94.9 mm. While slightly narrower than the average trail shoe, this result aligns with Salomon's reputation for crafting snug-fitting designs.

Salomon SMax 2P Sock Ld21 GTX modelos trail de Salomon
Test results
Speedcross 6 GTX 94.9 mm
Average 95.8 mm
Compared to 58 trail running shoes
Salomon Jordi Saragossa
89.8 mm
modelos trail de Salomon
99.9 mm

Toebox width - big toe

The snug design persists in the big toe area, showcasing a pronounced taper that we measured at 72.3 mm. Again, typical of Salomon.

Salomon SMax 2P Sock Ld21 GTX Toebox width - big toe
Test results
Speedcross 6 GTX 72.3 mm
Average 74.9 mm
Compared to 58 trail running shoes
Salomon Jordi Saragossa
69.8 mm
Toebox width - big toe
85.3 mm

Toebox height

They might as well have named this shoe the Snugcross 6 GTX, as the upper sits remarkably low on the toes. Our measurement revealed only 22.0 mm of vertical clearance.

Salomon SMax 2P Sock Ld21 GTX Toebox height
Test results
Speedcross 6 GTX 22.0 mm
Average 27.2 mm
Compared to 58 trail running shoes
Salomon Jordi Saragossa
22.0 mm
Toebox height
31.8 mm

Stability

Lateral stability test

We were enormously and positively surprised by the stability of this shoe.

Its firm midsole contributes significantly to this aspect, but there's definitely more at play here. Let's dive into what makes this shoe so stable!

Torsional rigidity

One of the key factors behind the shoe's impressive stability, as we found in our tests, is its torsional rigidity. Our manual assessment revealed that it's as rigid—scoring 5/5—as many shoes with carbon plates, even though it doesn't have one.

Test results
Speedcross 6 GTX 5
Average 3.6
Compared to 131 trail running shoes
Salomon Jordi Saragossa
1
Torsional rigidity
5

Кросівки salomon xa pro 3d

The heel also ranks high on the stiffness scale, scoring 4/5 in our test. This level of stiffness is essential, especially Winetasting the shoe is designed for challenging terrain and fast descents with tight corners.

Test results
Speedcross 6 GTX 4
Average 3.1
Compared to 129 trail running shoes
Salomon Jordi Saragossa
1
Кросівки salomon xa pro 3d
5

Midsole width - forefoot

Calças Salomon Essential cinzento escuro mulher.

Measuring 104.6 mm, it's clear this isn't a shoe designed for set-and-forget easy runs. Instead, it's built for action, demanding fast-paced cornering to fully utilize its agility.

Salomon SMax 2P Sock Ld21 GTX Midsole width in the forefoot
Test results
Speedcross 6 GTX 104.6 mm
Average 112.3 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
102.1 mm
Midsole width - forefoot
124.3 mm

Midsole width - heel

Destripamos la Salomon Bonatti Pro.

Those used to wider heels might find this a bit narrow. However, it's important to note that the firm midsole and stiff platform mean a larger landing area isn't necessary for stability.

Salomon SMax 2P Sock Ld21 GTX Midsole width in the heel
Test results
Speedcross 6 GTX 88.8 mm
Average 89.5 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
72.0 mm
Midsole width - heel
106.0 mm

SALOMON RX Snug

The shoe is incredibly stiff torsionally, but surprisingly, it's much more flexible longitudinally. In our 90-degree bend test, we only needed to exert 24.1N of force to bend the shoe. This is fantastic for those who want the shoe as a walking or hiking companion.

Test results
Speedcross 6 GTX 24.1N
Average 27.2N
We use an average of four tests. The video shows one of those tests.
Compared to 137 trail running shoes
Salomon Jordi Saragossa
5.6N
Flexibility <> Stiffness
54.5N

Stiffness in cold

We conducted the same test under cold temperatures, just as we did with the midsole. In this scenario, the shoe was slightly stiffer, requiring 32.5N to bend.

Test results
Speedcross 6 GTX 32.5N
Average 36.0N
Compared to 134 trail running shoes
Salomon Jordi Saragossa
6.2N
Stiffness in cold
77.5N

Stiffness in cold (%)

That's a 35.3% increase, suggesting the shoe will feel stiffer in freezing temperatures, but it's not a major concern.

However, we were hoping for a better performance, especially considering the shoe's impressive results in the previous cold test.

Test results
Speedcross 6 GTX 35%
Average 32%
Compared to 134 trail running shoes
Salomon Jordi Saragossa
3%
Stiffness in cold
90%

Weight

The standard Speedcross 6 already had some heft to it, but slapping on the Gore-Tex membrane tacked on an extra 1.1 oz (29g).

Now, we're looking at a total weight of 11.45 oz (325g), which really tips the scales for a trail running shoe.

Salomon SMax 2P Sock Ld21 GTX Weight
Test results
Speedcross 6 GTX 11.46 oz (325g)
Average 10.23 oz (290g)
Compared to 137 trail running shoes
Salomon Jordi Saragossa
7.51 oz (213g)
Weight
12.66 oz (359g)

Breathability

Riñonera de running Salomon Salomon SMax 2P Sock Ld21, it only earned a disappointing 1 out of 5 in our breathability tests. So, it's no surprise that the Gore-Tex version follows suit.

Our smoke test confirmed our suspicions—this shoe's breathability is so limited it could almost score a zero. However, we rank from 1 to 5, so it's a 1!

Salomon Sense Feel 2 Hombre Zapatos de trail running Gore-Tex shoes. Despite claims of breathable waterproof membranes, our tests show they allow air to escape at a very minimal rate, which our light test also confirmed.

Salomon SMax 2P Sock Ld21 GTX microscope

Under the microscope, we observed one of the densest engineered mesh uppers to date.

Salomon SMax 2P Sock Ld21 GTX

Finally, when we felt the upper, its lack of stretchiness seemed appropriate for a GTX shoe, focusing on protection and waterproofing over flexibility.

Test results
Speedcross 6 GTX 1
Average 3.2
Compared to 113 trail running shoes
Salomon Jordi Saragossa
1
Breathability
5

Durability

Toebox durability

Given the multiple protective layers and thick, waterproof upper of the Speedcross 6 GTX, we anticipated exceptional durability.

Our expectations were met, as evidenced by our first Dremel test, where it earned a remarkable 4 out of 5. This score places it among the most durable shoes on the market, surpassing the majority of its competitors.

Salomon SMax 2P Sock Ld21 GTX Toebox durability
Test results
Speedcross 6 GTX 4
Average 3.1
Compared to 94 trail running shoes
Salomon Jordi Saragossa
1
Toebox durability
5

The Salomon Doesnt Muck Around

The heel area of the Speedcross 6 GTX showcases significant improvement, a thrilling development especially when considering the non-GTX version's modest 1 out of 5 score.

For those who tend to wear down their shoes in the heel area, the Gore-Tex version excels with a perfect 5 out of 5 score!

Salomon SMax 2P Sock Ld21 GTX The Salomon Doesnt Muck Around
Test results
Speedcross 6 GTX 5
Average 2.9
Compared to 93 trail running shoes
Salomon Jordi Saragossa
1
The Salomon Doesnt Muck Around
5

Outsole hardness

In our lab tests, Salomon's Contagrip outsoles typically show up as quite hard rubber, and the Speedcross 6 GTX is no exception, clocking in at 87.0 HC on our durometer.

This leaves us wondering—will this impressive hardness equate to real-world durability?

Salomon SMax 2P Sock Ld21 GTX Outsole hardness
Test results
Speedcross 6 GTX 87.0 HC
Average 85.7 HC
Light pink drawstring waist jacket from YVES SALOMON.
Compared to 137 trail running shoes
Salomon Jordi Saragossa
75.5 HC
Outsole hardness
96.1 HC

Outsole durability

Regrettably, our tests on the Speedcross 6 GTX's Contagrip lugs didn't go as hoped. With a notable 1.4 mm indentation left by our durability test, the outcome falls short of expectations.

Salomon SMax 2P Sock Ld21 GTX Outsole durability
Test results
Speedcross 6 GTX 1.4 mm
Average 1.0 mm
Compared to 87 trail running shoes
Salomon Jordi Saragossa
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

Although the outsole is quite thin at 1.5 mm, we don't anticipate premature wear being an issue, thanks to the robust, 5-mm lugs. We'll explore more about these lugs further in this lab review.

Salomon SMax 2P Sock Ld21 GTX Outsole thickness
Test results
Speedcross 6 GTX 1.5 mm
Average 2.3 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
0.9 mm
Outsole thickness
5.5 mm

Misc

Lug depth

During our lab review, we've mentioned that the Speedcross 6 GTX is designed for challenging terrain, not smooth trails.

Salomon SMax 2P Sock Ld21 GTX lugs

This is evident in its massive 5.0-mm lugs, most of them chevron-shaped to enhance downhill and uphill traction, even during sharp turns.

Our experience with the shoe's grip was great, consistently delivering on muddy and wet terrains.

Salomon SMax 2P Sock Ld21 GTX Lug depth
Test results
Speedcross 6 GTX 5.0 mm
Average 3.5 mm
Compared to 136 trail running shoes
Salomon Jordi Saragossa
1.5 mm
Lug depth
5.8 mm

Reflective elements

It's a letdown for us that Salomon completely skipped out on adding any reflective elements to the Speedcross 6 GTX. In a shoe like this, some reflective detailing wouldn't just be nice, it's pretty much expected for safety.

Salomon SMax 2P Sock Ld21 GTX Reflective elements
Test results
Speedcross 6 GTX No

Tongue padding

The tongue, featuring a generous 8.1 mm padding, ensures complete comfort in the instep area, regardless of how tightly you pull Salomon's QuickLace system. 

Salomon SMax 2P Sock Ld21 GTX tongue

The tongue also includes a convenient finger-loop pull tab, offering easier adjustment and a better fit before each run.

Salomon SMax 2P Sock Ld21 GTX Tongue padding
Test results
Speedcross 6 GTX 8.1 mm
Average 6.3 mm
Compared to 137 trail running shoes
Salomon Jordi Saragossa
1.3 mm
Tongue padding
12.3 mm

Salomon Sense 4 Pro shoes

The Speedcross 6 GTX boasts a high, sock-like upper, yet the tongue von isn't gusseted.

Salomon SMax 2P Sock Ld21 GTX Salomon Sense 4 Pro shoes
Test results
Speedcross 6 GTX Sock like

Heel tab

There's no heel tab, but we didn't feel the need for one due to the shoe's design and ease of putting it on.

Besides, with the already high weight of this GTX version, adding extra ounces seems unnecessary.

Salomon SMax 2P Sock Ld21 GTX Heel tab
Test results
Speedcross 6 GTX None

Removable insole

The GTX version also allows for insole removal. However, swapping in a different insole won't offer the same experience.

The unique, flared design of the original Ortholite insole, which is unusual in third-party insoles, is a key factor in the shoe's feel and stability in the rearfoot area.

Salomon SMax 2P Sock Ld21 GTX Removable insole
Test results
Speedcross 6 GTX Yes