Our verdict

As the more affordable version of the nike king Challenge 1, the Challenge Pro has a similarly stable and supportive design. Even though it makes small compromises here and there to keep the price down, we haven't found any dealbreakers in the Pro version. The shoe kept us planted and surefooted all around the court and is worth the attention of a beginner player who wants to experience some features of the more expensive tennis shoes.

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  • Excellent stability and lateral support
  • Great impact protection
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  • Stiff shank and sole add propulsion
  • Sturdy rubberized drag guard
  • Hard and durable rubber outsole
  • Gusseted tongue enhances foothold
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ebay nike king shox shoes cheap boys jeans for women Cons

  • Not very breathable
  • Heavier than average
  • Mesh is easily damaged

Audience verdict

89
Great!

Who should buy

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nike king gp challenge pro review 21276507 main 

Who should NOT buy

The GP Challenge Pro will not make the best option for players with wide feet. We recommend that these folks check out the K-Swiss Hypercourt Express 2 or the Adidas Solematch Control.

If you are willing to lunar a more enhanced version of this nike king shoe, check out the nike king huarache pro mid metal white paint.

nike king GP Challenge Pro lab test

ebay nike king shox shoes cheap boys jeans for women | Cushioning

ebay nike king shox shoes cheap boys jeans for women | Heel stack

Playtesting the GP Challenge Pro, we found it to be rather well-cushioned and protective on hard landings.

Based on our caliper measurements, its heel stack height comes in at 29.7 mm which is an average reading across tennis shoes.

nike king gp challenge pro heel stack 21276482 main

Oh, and we can't help but point out the odd rockered shape of this nike king tennis shoe!

This is a new twist that some brands have been putting on their tennis footwear, which is inspired by the running shoe design.

nike king GP Challenge Pro heel rocker

The curved shape works similarly to a rocking chair, helping the foot roll from the heel to the toes much faster and smoother. Even though it felt weird on foot at first, we quickly reaped the benefits of it when dashing forward towards the net.

It also came in very handy when we leaned back for a serve.

Test results
GP Challenge Pro 29.7 mm
Average 29.1 mm
Compared to 40 tennis shoes
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25.3 mm
Heel stack
33.0 mm

Forefoot stack

We also felt that the balls of our feet sat higher off the ground in the GP Challenge Pro.

nike king GP Challenge Pro flexibility

The shoe's forefoot stack height comes in at 23.4 mm which is a few millimeters than the average. This explains why the court feel isn't as pronounced in this nike king shoe.

If you enjoy a more sensitive connection to the court and better ground feedback, you will appreciate the new nike king mercurial superfly v cr7 fg outdoor gold much more.

nike king gp challenge pro forefoot stack 21276481 main
Test results
GP Challenge Pro 23.4 mm
Average 19.4 mm
Compared to 40 tennis shoes
girls nike king air pegasus shoes clearance boots
15.5 mm
Forefoot stack
23.4 mm

Drop

The heel-to-toe difference in the nike king GP Challenge Pro turns out to be lower than average at 6.3 mm.

We believe that many players won't even notice the difference but seasoned athletes may feel as though their feet sit a bit flatter and more parallel to the ground in the GP Challenge Pro.

When their heels are not elevated as high, players get a higher sense of control and stability inside the shoe.

nike king GP Challenge Pro Drop
Test results
GP Challenge Pro 6.3 mm
Average 9.7 mm
Compared to 40 tennis shoes
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6.2 mm
Drop
14.7 mm

Midsole softness

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

The GP Challenge Pro uses Nike's basic Phylon foam for its primary cushioning. It is a rather standard EVA foam which is common for the brand's entry-level models.

It is also a firmer type of cushioning with not much energy return.

Using a durometer, we measured the softness of the shoe's Phylon foam at 30.8 HA which is only 5% firmer than average. That is because most tennis shoes have a firmer type of cushioning to keep the player stable and connected during fast multi-directional movements.

But what gives the nike king GP Challenge Pro so much impact protection?

A large Zoom Air unit in the heel. It squishes and bounces back to make sure you land safely on your heels but doesn't compromise the overall stability of the shoe.

nike king GP Challenge Pro Midsole softness
Test results
GP Challenge Pro 30.8 HA
Average 28.6 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 40 tennis shoes
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17.1 HA
Midsole softness (soft to firm)
34.0 HA

Insole thickness

The shoe comes with a padded insole to buffer the foot from the firm midsole and the stiff shank. We measured its thickness at 4.7 mm which is slightly thinner than average but just right to feel comfortable in this nike king shoe.

nike king gp challenge pro insole thickness 21276486 main
Test results
GP Challenge Pro 4.7 mm
Average 5.1 mm
Compared to 40 tennis shoes
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3.4 mm
Insole thickness
7.5 mm

Size and fit

Size

cheap nike king free runs for men on ebay sale cars true to size (18 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 35 tennis shoes
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½ size small
Slightly small
True to size
Slightly large
½ size large

Toebox width - widest part

Like most nike king shoes, the GP Challenge Pro only comes in one standard medium width but we found that it fits similarly to most other tennis shoes in the same width.

Retrieving a gel mold of the shoe's toebox, we measured its widest part at 92.0 mm which is on par with the average of tennis shoes we measured in a men's US size 9.

nike king GP Challenge Pro Toebox width - widest part
Test results
GP Challenge Pro 92.0 mm
Average 92.9 mm
Compared to 28 tennis shoes
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88.7 mm
Toebox width - widest part
96.0 mm

Toebox width - big toe

However, the Challenge Pro does get a bit pointy towards the front narrowing down to 65.5 mm in the big toe area. That makes it a little less accommodating for payers with wide feet who need more space for long matches.

nike king GP Challenge Pro Toebox width - big toe
Test results
GP Challenge Pro 65.5 mm
Average 69.3 mm
Compared to 28 tennis shoes
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65.5 mm
Toebox width - big toe
74.3 mm

Toebox height

The vertical space, on the other hand, is not limited in this nike king shoe clocking in at a standard 24.0 mm.

nike king gp challenge pro toebox height 22761430 main
Test results
GP Challenge Pro 24.0 mm
Average 25.2 mm
Compared to 28 tennis shoes
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20.7 mm
Toebox height
29.2 mm

Stability

Lateral stability test

The nike king GP Challenge Pro ticks all the boxes of a stable tennis shoe. And the exaggerated blocky outriggers on its lateral side are only the most obvious ones.

Torsional rigidity

Do you know that nasty feeling of rolling your feet over the edge of the shoe? Or the more unfortunate case of an ankle twist?

Well, both are very unlikely to happen in a shoe that has a ton of torsional rigidity. And when a shoe can't be twisted sideways that easily, it won't let your foot roll either.

Checking the Challenge Pro's torsional stiffness in our manual test, we can shawl a stable footing in this shoe. On a 1-5 scale, where 5 is the stiffest, we rated it with a high score of 4.

This is largely provided by the stiff midfoot shank embedded into the shoe's midsole (the light green component beneath the Swoosh).

nike king GP Challenge Pro shank

We must also add that the shoe felt incredibly supportive throughout our playtest. It kept our feet securely in place even on the most aggressive lateral moves.

Test results
GP Challenge Pro 4
Average 4.4
Compared to 40 tennis shoes
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1
Torsional rigidity
5

Heel counter stiffness

A game of tennis demands a lot from the shoe's heel hold. It's got to be ready for the most rapid changes or directions as well as abrupt stops both forward and side-to-side.

That's why we assess how stiff and structured the heel counter is on every tennis shoe.

Our manual squeeze-and-push test revealed that the nike king GP Challenge Pro has a fairly rigid heel counter. On a 1-5 stiffness scale, we gave it a solid score of 4.

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Test results
GP Challenge Pro 4
Average 4
Compared to 40 tennis shoes
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1
Heel counter stiffness
5

Midsole width - forefoot

When we first saw the GP Challenge Pro, we were immediately struck by its large protruding outriggers on the lateral side. They look (and feel) exactly like brick walls that don't let the foot roll uncontrollably.

Of course, these blocks extend the width of the shoe's platform far above the average.

Measuring the widest part of the forefoot with a caliper, we got 115.8 mm which makes it one of the widest in our roster of tennis shoes.

nike king GP Challenge Pro Midsole width in the forefoot
Test results
GP Challenge Pro 115.8 mm
Average 111.8 mm
Compared to 40 tennis shoes
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105.3 mm
Midsole width - forefoot
117.4 mm

Midsole width - heel

The outrigger in the shoe's heel also protrudes further than the average. With a caliper reading of 93.9 mm in the widest part, it is about 4 mm wider than most tennis shoes.

Having such a broad platform made us feel wonderfully planted whether it was at the baseline or when moving around the court.

nike king GP Challenge Pro Midsole width in the heel
Test results
GP Challenge Pro 93.9 mm
Average 89.6 mm
Compared to 40 tennis shoes
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82.4 mm
Midsole width - heel
99.7 mm

Midfoot cage

Last but not least, the nike king GP Challenge Pro features a synthetic midfoot cage to enhance the foothold.

nike king gp challenge pro midfoot cage 21276569 main

Placed on both sides of the shoe, these thick and wide overlays are also integrated with the lacing system. Once the shoe is fully cinched up, the side support comes into play as well.

And if you want next-level side support, check out Nike's GP Challenge 1. It features even sturdier TPU overlays to hold the midfoot in place.

Flexibility / Stiffness

With its burly midsole, high stack, and TPU shank, of course, the cheap nike king free runs for men on ebay sale cars far from being a fexible shoe. Even after a break-in period of several on-court hours, the shoe did not give in that much.

To measure its stiffness precisely, we bent the shoe to a 30-degree angle on a flexiblity testing machine. The latter showed that it takes as much as 21.4N of force which is significantly more than it takes an average tennis shoe.

But there are two sides to the coin: the shoe doesn't flex so easily with the foot but there is a good amount of propulsion for snappier toe-offs.

nike king gp challenge pro flexibility stiffness 22813618 main
Test results
GP Challenge Pro 21.4N
Average 16.2N
Compared to 28 tennis shoes
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10.4N
Flexibility <> Stiffness
24.3N

Weight

Having a chunky sole with large outriggers and a generously padded upper, we were not surprised to find that the cheap nike king free runs for men on ebay sale cars a heavier shoe.

nike king gp challenge pro weight 21276613 main

Weighing it in a men's US size 9, our scale showed 14.0 oz (397g) which is over an ounce heavier than the average tennis shoe.

nike king GP Challenge Pro medial side

If you want a similar pack of features in a lighter setup, we recommend the ASICS Gel Challenger 14 and the K-Swiss Hypercourt Express 2.

Test results
GP Challenge Pro 14.00 oz (397g)
Average 12.70 oz (360g)
Compared to 40 tennis shoes
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10.30 oz (292g)
Weight
14.71 oz (417g)

Breathability

It looks like nike king prioritized comfort at the cost of breathability in the GP Challenge Pro. The shoe is lined with soft and padded layers but leaves little room for ventilation.

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Even in our smoke-pumping breathability test, the smoke could only pass through the small gap between the tongue and the upper. The shoe's toebox mesh doesn't provide much airflow.

We turned to our microscope to take a closer look at the mesh.

nike king GP Challenge Pro microscope

Just as we expected, the fabric comprises multiple layers of mesh stacked on top of each other. As a result, ventilation pores end up rather small with little ventilation capacity.

nike king GP Challenge Pro microscope upper

All things considered, the nike king GP Challenge Pro earns a lower-than-average breathability score of 3.

Test results
GP Challenge Pro 3
Average 3.3
Compared to 40 tennis shoes
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1
Breathability
5

Durability

Toebox durability

In tennis shoes, the medial side of the toebox is most prone to abrasion due to toe drags. nike king made sure that the Challenge Pro has enough protection here by covering it with a sturdy rubber guard.

It even Shoes the edges of the outsole to protect this highly sensitive area.

nike king GP Challenge Pro toe drag guard

However, the shoe's exposed parts turn out to be less wear-resistant. Accidentally slashing them against the court is likely to result in a serious tear.

A quick durability test with a Dremel proved our concerns. Having applied the tool's sandpaper tip to the unprotected part of the shoe's toebox for 12 seconds, we saw significant damage to the fabric.

nike king GP Challenge Pro Toebox durability test

Luckily, it was not a see-through hole so this nike king shoe earned a point.

All in all, we rated the Challenge Pro's toebox durability with 3 out of 5. This is lower than average but is fair enough for a more affordable tennis shoe.

Test results
GP Challenge Pro 3
Average 3.8
Compared to 38 tennis shoes
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1
Toebox durability
5

Heel padding durability

On the other hand, the shoe's seemingly delicate inner lining showed a higher score in our Dremel tests.

Keeping the speed at 5K RPM, we applied the tool to the back of the collar for 4 seconds. It left a barely noticeable scuffing which convinced us to rate the shoe's heel padding durability with a high score of 4 out of 5.

Looks like the shoe's inner lining is ready for lots of friction!

nike king GP Challenge Pro Heel padding durability test
Test results
GP Challenge Pro 4
Average 3.3
Compared to 38 tennis shoes
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1
Heel padding durability
5

Outsole hardness

The shoe's outsole surprised us with a very hard rubber compound. Pressing our durometer against it returned a reading of 87.5 HC. That's harder than average!

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nike king GP Challenge Pro Outsole hardness
Test results
GP Challenge Pro 87.5 HC
Average 86.1 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 40 tennis shoes
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78.5 HC
Outsole hardness
92.0 HC

Outsole durability

But let's test our assumptions with a Dremel.

First, we set the Dremel speed to the demanding 10K RPM and held its sandpaper tip against the shoe's outsole for 22 seconds. For the record, the pressure of the tip remained consistent (3.2N) for the entire test.

After that, we measured the dent which appeared on the outsole with a tread gauge. And this is where we must say "Wow!" It was only 0.6 mm deep, just the same as the average.

Even though this nike king tennis shoe is cheaper than average, its outsole durability is comparable to some of the pricier shoes.

nike king GP Challenge Pro Outsole durability test
Test results
GP Challenge Pro 0.6 mm
Average 0.8 mm
Compared to 38 tennis shoes
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0.0 mm
Outsole wear
2.0 mm

Outsole thickness

The GP Challenge Pro also has a decent amount of rubber in the outsole. With a caliper measurement of 3.5 mm, it is slightly (but not critically) thinner than average.

But given its impressive abrasion resistance, we expect average longevity from this nike king shoe's outsole.

nike king gp challenge pro outsole thickness 21276479 main
Test results
GP Challenge Pro 3.5 mm
Average 4.2 mm
Compared to 40 tennis shoes
girls nike king air pegasus shoes clearance boots
3.0 mm
Outsole thickness
5.2 mm

Misc

Grip / Traction

The nike king GP Challenge Pro features a full-length herringbone pattern which showed excellent grip on the court.

Because the shoe's outsole is made of hard rubber, it also has a good give. It took us little effort to pivot and slide out of shots.

nike king gp challenge pro outsole 21276565 main

Tongue padding

The nike king GP Challenge Pro has an amazingly comfortable step-in feel thanks to its well-padded interiors. Its tongue is on the thicker side of the spectrum with a caliper measurement of 11.3 mm.

nike king gp challenge pro tongue padding 21276615 main
Test results
GP Challenge Pro 11.3 mm
Average 7.9 mm
Compared to 40 tennis shoes
girls nike king air pegasus shoes clearance boots
2.5 mm
Tongue padding
13.1 mm

Tongue: gusset type

One big advantage of the GP Challenge Pro is its gusseted tongue. We love how this seemingly minor feature makes a big difference in the shoe's foothold.

We felt securely locked on at all times during the playtest and there was no tongue sliding or bunching whatsoever.

nike king GP Challenge Pro Tongue: gusset type
Test results
GP Challenge Pro Both sides (full)

Heel tab

There are no finger loops or heel tabs at the back of the Challenge Pro. However, its collar has a so-called U shape which is specifically designed for easier on-and-off action.

Having worn this nike king shoe more than a few times, we can subscribe to that statement.

nike king GP Challenge Pro Heel tab
Test results
GP Challenge Pro None

Removable insole

This nike king shoe comes with a rather basic insole with no extra features. It is neither contoured nor moisture-wicking. But the good news is that you can easily remove and swap it for an orthotic of your choice.

nike king gp challenge pro removable insole 21276614 main
Test results
GP Challenge Pro Yes