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Saucony Endorphin Speed 4 Review (2024): Still on Top?

Saucony Endorphin Speed 4 review

As the name suggests, the Speed was initially conceived for… speed. But the series won over many runners with its versatility and quickly became a reference, fast daily trainer. Version 3 was especially great and was ranked by many experts as one of the best shoes of 2023.

Saucony has expanded its Endorphin series with the release of the Elite. As a result, the Endorphin Pro 4 has become more forgiving, leaving pure performance to the Elite. So, where does this new iteration of Endorphin Speed fit in?

Let’s find out in this in-depth review, based on my test runs comprising several types of sessions and the experiences of other runners whose judgment I respect.

review Saucony Endorphin Speed 4

What You Need to Know

9.5Overall Score

Excellent shoes with a nylon plate that provides excellent responsive bounce for fast paces.

The Saucony Endorphin Speed 4 is the new version of a very popular series, highly acclaimed by runners. It comes out at the same time as the Saucony Endorphin Pro 4, with several new features.

The midsole features PWRRUN PB foam and a new nylon plate, again combined with SPEEDROLL technology for added propulsion.

The new SRS insole provides extra bounce. The underfoot feel on impact is balanced, somewhere between firm and soft, for greater responsiveness than on previous versions.

The upper features a new stretchy mesh for improved breathability and fit. The outsole also provides better grip and is more durable.

In short, the Saucony Endorphin Speed 4 is more responsive, making it a great pick for speed or tempo pace training. It’s also an excellent racing alternative for those who don’t like the rigidity of a carbon plate.

Foot lockdown and protection


  • Versatile shoe for daily training
  • Improved grip even on wet surfaces
  • Good stability
  • Durable shoe
  • Comfortable upper with good ventilation
  • Good bounce with the plate


  • Less pleasant at low paces than v3
  • Less suitable for longer distances for some runners


Saucony Endorphin Speed 4 cushioning foam

Let’s take a look at the midsole technologies:

  • PWRRUN PB is described by the brand as its lightest and most flexible foam. It’s the same as v3.
  • The nylon plate comes with greater torsional rigidity and pairs with the SPEEDROLL rocker design for smooth back-to-front transitions
  • The Super Responsive Sockliner (SRS) provides extra bounce

The balanced feel offers a very pleasant ride. The decent stack, with a 36 mm heel height (28 mm under the toes), delivers excellent shock absorption.

PWRRUN PB foam Saucony Endorphin Speed 4

However, some testers noted that the shoe is less suited for long-distance running over a certain weight. That’s the only limitation: the Saucony Endorphin Speed 4 offers the cushioning needed for the marathon for most runners.

The heel-to-toe drop of 8 mm is classic and won’t require any transition time.

Energy return

Despite a very slight weight increase (236 g/8.3 oz vs. 229 g/8.1 oz in size 42), the shoe remains lightweight. Overall, runners find the shoe more responsive than v3, and that’s also what I felt during my tests. Indeed, there’s more propulsion as the rocker works better to facilitate transitions, providing more running economy.

julien guyod testing Saucony Endorphin Speed 4

Since the construction and foam are the same, we can assume the extra weight comes from the new plate, which features vertical overlays for greater rigidity and better energy return while retaining flexibility at the front for a snappy toe-off.

The responsiveness is very good. The shoes aren’t necessarily bouncy, but you feel propelled forward with the plate and the rocker. As a result, the Speed 4 is an excellent choice for runners looking to go fast, but who find carbon shoes too stiff.

Support and stability

Saucony Endorphin Speed 4 heel

The previous version was already very stable, and this v4 is just as good on this front. The precise lockdown, effective grip, and balanced feel allow for a confident stride despite the fairly high stack.

The wider platform (5 mm more) also provides excellent stability for this neutral shoe (no gait correction).

Foot Lockdown

The upper has undergone several changes. We’ve gone from a single-layer design to a double-layer design, one of which is integrated for a close fit to the foot. The shoes are comfortable, and the mesh stretches.

Saucony Endorphin Speed 4 engineered mesh upper

I thought there would be less ventilation, but that’s not the case. The numerous perforations all along the mesh do a good job keeping the Endorphin Speed 4 breathable, while the extra layer offers better protection in cooler temperatures.

Runners unanimously praised the fit. It’s close enough to the foot for an effective lockdown when picking up the pace while retaining enough room for comfort. The gusseted tongue is effective, and the semi-rigid heel counter keeps it firmly in place.

Saucony Endorphin Speed 4 toe box

Also, the padding in these areas, including the heel collar, gives comfort similar to regular daily trainers. I also enjoyed the lateral overlays that contribute to the five-star fit.

The shoe runs true to size. I picked my usual size and didn’t have any issues despite my wife feet.


The outsole performs even better than in the previous edition (where it was already fantastic).

The new layout of the XT-900 rubber translates into a lattice design with a large piece in the forefoot.

On the heel, there’s a piece of rubber on each side and a deep groove in the middle for good flexibility.

Saucony Endorphin Speed 4 rubber outsole

According to the testers, the rubber is more grippy and traction is better. I also found the grip very good on wet surfaces; I didn’t have any scares even when turning at fast speed. I felt safe in all conditions.

Of course, it’s a road shoe, so traction is not as impressive on more technical terrain. However, the shoes are perfectly suitable for easy off-road dry paths.


runner wearing Saucony Endorphin Speed 4

Originally, the Speed was designed for speed, leaving the training part to the Shift series. But with each successive version, runners began to adopt them as a pair of trainers. Not in the same categories as the Saucony Guide or Saucony Triumph, but rather as a snappy shoe for fast sessions with superior versatility.

This new version is a little different. Indeed, runners who have experienced the previous ones describe it as a mix of the v1 and v3. It’s more responsive, and some runners find it less suited to low paces.

It all depends on what you’re looking for: the v4 is now closer to other brands’ responsive models like the Asics Magic Speed 3 than to everyday trainers like the Nike Pegasus 40.

Endorphin Speed 4 Saucony

As far as I’m concerned, the Speed fully lives up to its specification, i.e. it can be used for a wide range of paces, whatever the distance. On this point, some people note that they find it more demanding and don’t think they could push it all the way to a marathon. Here again, it all depends on individual goals and preferences.

Last but not least, the shoe is an excellent competition alternative for runners looking for a pair of lightweight, fast shoes with more flexibility than a carbon plate model.

Quality and Durability

Saucony Endorphin Speed 4 on feet

The outsole is more durable than the previous version, which was already convincing. The upper shows no signs of early wear, and the PEBA foam will retain its properties over time (we didn’t find any negative comments, and I didn’t notice any deterioration).

This is still a relatively expensive product, but it’s undoubtedly high-quality.

The Saucony Endorphin Speed 4 contains recycled materials (in an unknown proportion) and is vegan.

Saucony Endorphin Speed 4 road running shoes

Saucony Endorphin Speed 3 vs 4

There are several new improvements:

  • A new nylon plate
  • A higher-performance, more durable outsole
  • A redesigned upper for improved ventilation
  • A new SRS insole for enhanced bounce
  • A wider platform for improved stability

The general consensus is that the Saucony Endorphin Speed 4 are heavier, but more responsive. For fast-paced training and competitions, they are better suited. The v3 is better suited to slower paces. The two versions are quite similar, however, so it’s up to you to decide what’s on offer during promotion periods.

For more comparisons, check out our exclusive tool.


Saucony Endorphin Speed 4 road running shoes with nylon plate

The Saucony Endorphin Speed 4 doesn’t disappoint and should continue to appeal to a wide range of runners of all levels, from beginners who want to improve performance without going down the carbon road yet to experts who will enjoy the combination of comfort and performance in their rotation.

There are no real restrictions regarding scenarios: the cushioning is sufficient to extend the distance confidently, and the propulsion provides performance whenever you need to accelerate, whether in competition or for daily training.


Technical Specs

Pronation typeNeutral
Drop8 mm
Heel height36 mm
Forefoot height28 mm
Weight (men)236 g/8.3 oz
Weight (women)206 g/7.3 oz
FeaturesVegan, Recycled materials, Nylon plate
Release year2024
PriceCheck prices




OutsoleXT-900 Rubber
UpperDouble-layer engineered mesh


SpeedModerate, Fast
DistanceShort, 5K, Mid, 10K, Half marathon, Long
WorkoutDaily running, Racing
Julien Guyod

Julien Guyod

Julien Guyod, 40, is a math teacher and freelance writer. He took up running in 2015 and specializes in marathons, clocking in with a 2:38 personal best at the La Rochelle marathon in France. He's passionate about running shoes and loves to share his impressions of the models he's tested, always pushing the mileage further to discover more insights!

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