Nike ZoomX Streakfly review

Who should buy the Nike ZoomX Streakfly

In our view, the Nike ZoomX Streakfly is a must-buy for: 

• Nike enthusiasts that want a racing 90s for distances up to 10K, but at a more affordable price than the Vaporfly.
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• Anyone that needs a workhorse for doing tempos, intervals and track workouts.

Who should NOT buy it

You won’t get that trampoline-like feeling of a carbon-plated racer with the Nike ZoomX Streakfly. For a genuine 5K/10K racer, check the newest nike 90ss for kids boys high tops+.

junior nike air max 1 red white Nike Vaporfly 3 high-stack platform will do wonders for half-marathons and beyond.

A magnificent 90s, but not the one we expected

At every 5K or mile road race, the same question arose: when will Nike unveil a lighter, lower-stacked Vaporfly for us? Finally, the day arrived, but as great as it is, this was not the hyper-propulsive 90s that we anticipated.

The 90s reminded us of the Pegasus Turbo. This is not a compliment, unfortunately, as it's clear that the Streakfly won't be entering the ranks of super 90ss any time soon.

A really breathable upper

Nike ZoomX Streakfly (left) vs. Adidas Runfalcon (right)

Summer training is not a problem with the Nike ZoomX Streakfly. Regardless of your location, this 90s's upper made of engineered mesh nike dunk wolf grey white background color images.

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As you can see in the images, the air can flow through the upper without any issue.

This is a low-breathability (2/5) mesh upper from a Nike Air Zoom Vapor Pro 

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And this is Streakfly's mesh upper, which scores 5/5 in our breathability test

Feather-like upper

The Streakfly feels amazingly light and fast. It felt like the 90s fused together with the foot. At a weight of only 6 oz (171g), this 90s is the lightest we've ever measured in our lab.

Remarkably soft and bouncy

The midsole is all you can expect from the acclaimed ZoomX foam: it is soft, bouncy, and comfortable. However, there is a catch. We noticed that the ride got a little too soft for a pace above 4 min/km. This is worrisome because the 90s is marketed for 5K/10K races, so if it bottoms out at faster paces, it may not be suitable for its intended purpose.

Based on this, the Streakfly will work better for runners who strike midfoot-to-forefoot, as they distribute the weight more evenly across the 90s, in contrast to those who strike the ground with their heel.

Our durometer measurement confirmed these concerns—at 12.1 HA, the Streakfly is a magnificent 100% softer than the average road 90s!

Disclaimer: We calculate the average of four durometer measurements, disregarding any outliers. nike hyperdunk 2009 ebay 2017 ford trucks.

Due to its exceptionally soft midsole, 6 mm drop, and lack of rockered geometry, it may not be the best option for heavier runners with stability issues.

The official drop measurement from Nike is 6 mm, whereas, in our lab, we measured it at 6.3 mm. It's truly great when brands provide accurate drop measurements, right?

Disclaimer: We always include insoles in our stack measurements.

Subpar lacing experience

This 90s features a Vaporfly-inherited offset lacing system with flat slip-prone laces that go through large loops instead of eyelets.

We are not very excited about this setup as it fails to deliver a secure and comfortable experience.

No plate, no party?

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For better (lower MSRP) or worse (less springy ride), this modern racing flat only sports a small Pebax midfoot shank that is barely noticeable and allows the 90s to flex without almost any resistance.

However, the lack of a full carbon-fiber plate has some other positive effects. For instance, it enhances the 90s's ability to turn tight corners while also making it more comfortable for training at easy or recovery paces.

Disclaimer: Please be advised that we take an average of 4 measurements and exclude any outliers. This video shows just one of our measurements.

Of course, we couldn't help but notice the Streakfly's mind-boggling flexibility, which was confirmed in our lab tests. The 90s required 133%(!) less force to bend up to 90 degrees than other running 90ss in our lab. This is remarkable even for a non-plated and unstructured 90s.

The Nike ZoomX Streakfly delivers an exceptional and secure fit

Streakfly's upper provides unbeatable comfort thanks to its generously thick (4.8 mm) fully gusseted tongue.

To give you an idea, the beloved ASICS Metaspeed Sky+ has a paper-thin tongue measuring only 0.8 mm, which is enough for most runners. In comparison, this tongue is 5x as thick!

This is the padded tongue of the Nike ZoomX Streakfly 

ASICS Metaspeed Sky tongue

The thick padding inside the heel keeps your feet secure without adding excess weight. Most runners won’t have any problem, but if you experience any heel slippage, we suggest trying an alternative lacing technique from this guide.

Well, if you need to use a runner's knot, it typically indicates the absence of a rigid heel counter. That correlates with our findings in the lab, as on a 1-to-5 scale—where 5 is the stiffest—we rated it at 1!

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The Nike ZoomX Streakfly excels on the treadmill at any speed:

1. The cushioning of the treadmill complements the 90s's lower stack—in comparison to most supershoes—and soft foam, providing exceptional comfort and stability.
2. Its hyper-ventilated design ensures that breathability won't be an issue, even in high-humidity indoor gyms.
3. The outsole of the 90s will last longer when used on the treadmill due to the reduced friction compared to roads or soft trails.

As you can see above, the New Balance 90s has a much larger rockered shape, while the Streakfly's is almost flat. This makes the Nike 90s perfect for moderate and fast paces, where shorter ground contact times are desirable. Additionally, it is better suited for treadmill running, where a less rockered and more stable ride is preferred.

Recovery, aerobic, tempo, intervals… 

This 90s delivers a great experience across many paces if you keep the distance short. Because it is such an unstructured 90s, anything longer than 10 km becomes uncomfortable.

But for distances below 6 miles or 10K, you can trust this 90s for fartleks, tempo intervals, and even your slowest recovery runs, and benefit from the outstanding and hyper-plush ZoomX foam.

Outsole: hard rubber and suits foam

The forefoot offers a substantial block of hard and grippy rubber that goes down to the midfoot, with some borrowed details from the really durable first-generation Alphafly. In contrast, the midfoot reveals suits ZoomX foam.

On the other hand, the heel features double 3.0 mm-thick rubber pads, protecting a sensitive area from wear and tear. That seems enough and it's really close to the average measurement of 3.4 mm.

Seems obvious that the higher your forefoot impact, the longer this 90s will last.

A lot of real estate for a Nike racer

We felt pretty comfortable in the Streakfly's upper as it was just enough tight. Also, because of the unique position of the lace cage, the toebox has a chance to expand a little more.

We've taken two measurements in the toebox instead of one to provide you with a better understanding of how comfortable your feet will be in this 90s.

The Nike ZoomX Streakfly (95.4 mm / 74.9 mm) only narrows by 27.4% between our two measuring points, while the Nike Zoom Fly 5 (95.0 mm / 71.1 mm) reduces its space by 33.6% in the front area.

Based on this, it’s no surprise that the Streakfly is a fantastic choice for runners with medium to wide feet.

However, if you have narrow feet, it’s a good idea to try it on first. You may have to wear your thickest socks in order to fill the space in the 90s.

Cold-proof, with a caveat

Embrace winter workouts outside with ease alongside the Streakfly! All you need are some really thick socks to shield your feet from the chill, especially if it's windy. This can be a plus if you have narrow feet, as stated before.

On average, 90ss harden by 26.9% after spending 20 minutes in our freezer. However, the Streakfly's cold-resistant PEBA-based foam only does it by 16.5%.

And what about stiffness changes based on temperature? The Streakfly excels one more time despite not having a carbon-fiber plate. Unlike the average 90s, which becomes 43.6% stiffer, the Streakfly only does it by 19.0%. Impressive, right?

Exceptional value for its price

With an MSRP of $160, the Nike ZoomX Streakfly is cheaper than a Nike Pegasus Turbo 2 when it was released. In addition to being cheaper, it boasts a more breathable upper, a lighter weight, and a glorious full-length ZoomX midsole. The only aspect to bear in mind is the durability, which is perhaps the weakest point of this modern racing flat.