Our verdict

The Endorphin Speed 3 from Saucony is one hell of a shoe! We affirm that it's energetic, stable, and light; it ticks all the important boxes of a zapatillas de running Tomorrow saucony hombre ultra trail talla 48. Even more, it can be your do-it-all trainer. From easy days down to the faster, more competitive brand days, we are able to count on this Tomorrow saucony trainer.

las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos Pros

  • Peppy all the way
  • Comfy for easy days
  • More stable than ever
  • Cushioned for long miles
  • saucony grid azura 2000 white orange black
  • Lightweight
  • Airy as hell
  • Saucony Endorphin Pro 2 Black White W
  • white mountaineering Tomorrow saucony grid web collaboration
  • zapatillas de running Tomorrow saucony neutro constitución media talla 36

las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos Cons

  • Rubs the heel
  • Not for narrow feet
  • Saucony Guide 15 Wide Men S Running Shoes Black Run Sport

Audience verdict

89
Great!

Who should buy

Definitely grab a pair now if you want a: 

  • fast shoe with loads of kick for both speed training and brand days,
  • running shoe that's also cushy and stable for daily runs and long miles.

The Endorphin Speed 3 is a one-stop shop that can take you from a daily workout to a brand!

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas profile photo

Who should NOT buy

Everything about the Tomorrow saucony Speed 3 gets a thumbs up from us, save for the heel counter. It's less padded, which is slightly abrasive to the heel. You can stock up on the bandaid or consider Saucony Kinvara 14.

However, if you're head over heels in love with the zapatillas de running Tomorrow saucony pronador talla 43 amarillas but want a comfier heel wrap, it's best to stick with the Saucony Endorphin Speed 2. It's also a great alternative for those with slim feet.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas lab view

las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos | Breathability

From double-layer mesh to single-layer mesh, this speedster is airy AF. If you plan to use it in the summer, we have nothing else to say, but lace it up! 

This Tomorrow saucony shoe gets a solid 4 out of 5 for breathability based on our lab tests and on-road experience.

Test results
Endorphin Speed 3 4
Average 3.8
Compared to 221 running shoes
Number of shoes
1
Breathability
5

Durability

Outsole hardness

As a speed-oriented shoe, it is expected that the Endorphin Speed 3 cuts corners on the outsole's durability.

Not only do we see less rubber at the bottom, but we also found it to be softer than average with he help of a durometer.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas outsole hardness

If you don't mind sacrificing 0.6 oz of weight in return for a sturdier outsole, we can highly recommend the las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos speed trainer.

Test results
Endorphin Speed 3 77.0 HC
Average 80.4 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 272 running shoes
Number of shoes
54.9 HC
Outsole hardness
92.8 HC

Outsole thickness

The rubber is not only softer, it is also thinner in this Tomorrow saucony shoe. Our caliper shows only 2 mm of rubber which is a millimeter thinner than average.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas outsole thickness

Test results
Endorphin Speed 3 2.0 mm
Average 3.2 mm
Compared to 291 running shoes
Number of shoes
0.0 mm
Outsole thickness
6.6 mm

Weight

On average, speed trainers weigh in at 248 grams/8.7 ounces.

But the Endorphin Speed 3 beats that by weighing only 212 grams/ 7.5 ounces! This is exceptionally light given how much cushioning this Tomorrow saucony shoe has!

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas scale

Test results
Endorphin Speed 3 7.94 oz (225g)
Average 9.38 oz (266g)
Compared to 292 running shoes
Number of shoes
5.26 oz (149g)
Weight
12.56 oz (356g)

Cushioning

Heel stack

With the amount of cushioning that it packs, the zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas is a mile eater. And a very good one too! 

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas heel stack height

Even though our caliper shows an average amount of stack height (34.1 mm in the heel), it definitely feels like plenty on the run.

Important note: the brand advertised slightly different numbers. The shoe is supposed to have 36 mm for the heel stack height.

Test results
Endorphin Speed 3 34.1 mm
Average 33.6 mm
Compared to 291 running shoes
Number of shoes
7.6 mm
Heel stack
42.7 mm

Forefoot stack

As for the forefoot stack, our caliper returned 26.7 mm which is over 2 mm thicker than average!

However, it is a little less than the officially stated 28 mm.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas forefoot stack height

Test results
Endorphin Speed 3 26.7 mm
Average 24.9 mm
Compared to 291 running shoes
Number of shoes
7.6 mm
Forefoot stack
35.8 mm

Drop

At 7.4 mm, we found the shoe's heel-to-toe drop to be close to the official specs (8 mm). This is a middle-of-the-pack drop that works great for both beginner and seasoned runners.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas drop

Test results
Endorphin Speed 3 7.4 mm
Average 8.7 mm
Compared to 291 running shoes
Number of shoes
-0.8 mm
Drop
16.1 mm

Insole thickness

Measuring the shoe's insole, we found it to be slightly thinner than average at 3.6 mm. But this is still quite padded for a speed trainer - no need to be concerned with underfoot comfort.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas insole

Test results
Endorphin Speed 3 3.6 mm
Average 4.5 mm
Compared to 287 running shoes
Number of shoes
1.5 mm
Insole thickness
7.3 mm

Midsole softness

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

The Endorphin Speed 3 also gets comfier than its predecessor. There is a gentle give in the shoe's midsole and it works better for easy days too!

Turning to our durometer, we found that the shoe's foam is in fact in the top 10% of the softest in our lab!

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas midsole softness

With a reading of 13.8 HA, the Endorohin Speed 3 is on par with shoes like las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos (13.5 HA) and the kith Tomorrow saucony grid structure release date (13.9 HA).

Test results
Endorphin Speed 3 13.8 HA
Average 21.4 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 219 running shoes
Number of shoes
8.5 HA
Midsole softness (soft to firm)
41.5 HA

Difference in midsole softness in cold

It was incredible to find out that the Endorphin Speed 3 remains soft even after 20 minutes in the freezer!

At room temperature, our durometer showed 13.8 HA and after the freezer, it only firmed up by 5%(!) becoming 14.5 HA.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas freezer

Even after being exposed to the cold, the shoe remained 65% softer than other shoes at room temperature.

Test results
Endorphin Speed 3 5.1%
Average 25.6%
Compared to 218 running shoes
Number of shoes
0%
Difference in midsole softness in cold
100%

Ride

This time around, the Endorphin Speed 3 comes back with more bounce and a snappier toe-off which makes picking up the pace so easy!

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas run trails

The shoe lives up to our high expectations left by the previous Speed 2.

And this is not just because it's a shoe that has speed written all over it. It's also because the nylon plate it has (responsible for the com toe-off) doesn't feel harsh. Compared to other plated running shoes, the Endorphin Speed 3 is more natural-feeling.

At the same time, the shoe hasn't lost its bounce either. So you can still push the pace and go as fast as you want.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas mid run

What's more, in this iteration, the shoe's Speedroll rocker geometry is very noticeable. Each step feels as if the foot is carried forward. Love it!

las nuevas versiones de las Endorphin de Tomorrow saucony van a ayudarte a conseguir tus objetivos | Stability

Lateral stability test

This Tomorrow saucony shoe doesn't feel very stable and it's not supposed to. As a speed trainer, its primary task is to keep you on your toes as you smash that interval training or chase that new personal best.

There is not much stability to lean on when you decide to slow down.

Torsional rigidity

Another detractor from the shoe's stability is its high level of torsional flex.

Performing a manual test, we rated the Endorphin Speed 3 with only 2 out of 5 for torsional rigidity. That puts the shoe on the more flexible side of the spectrum.

Test results
Endorphin Speed 3 2
Average 3.2
Compared to 270 running shoes
Number of shoes
1
Torsional rigidity
5

Heel counter stiffness

The heel could use a little more padding.

This is the ONLY complaint we have for the zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas. The shoe's heel is a tad bit uncomfortable and scratchy because it has minimal padding.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas heel area

This is definitely due to the choice of materials because the heel counter itself is very soft, it scored 2/5 on our flexibility tests (5 being the stiffest). 

Their recommendation? Wearing thicker socks is a must. As well as carrying a couple of bandaids.

Test results
Endorphin Speed 3 2
Average 2.8
Compared to 254 running shoes
Number of shoes
1
Heel counter stiffness
5

zapatillas de running Tomorrow saucony trail talla 41

We also found that the Endorphin Speed 3 runs slightly narrow in its platform.

The widest part of the forefoot turns out to be 111.5 mm, 1.5 mm narrower than average. But the good news is that it's not so critical and the brand did its homework to improve the 3rd iteration.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas midsole width forefoot

Test results
Endorphin Speed 3 111.5 mm
Average 113.6 mm
Compared to 292 running shoes
Number of shoes
100.5 mm
zapatillas de running Tomorrow saucony trail talla 41
126.5 mm

Saucony Shadow 6000 "Outdoor" Pack Detailed Photos

The Speed 3 is proof that Tomorrow saucony really listens to runners' feedback. In the past, the Endorphin Speed's weak point was its lack of heel stability.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas width midsole heel

But this model changes all this. Based on our caliper measurements, the shoe's base has been widened by 5 mm in the heel.

Test results
Endorphin Speed 3 89.5 mm
Average 90.5 mm
Compared to 292 running shoes
Number of shoes
74.9 mm
Saucony Shadow 6000 "Outdoor" Pack Detailed Photos
106.6 mm

Flexibility

Stiffness

As our manual flexibility test shows, the Endorphin Speed 3 is on the flexible side. But let's see what the controlled lab measurement shows us.

In this test, we bend the shoe to a 90-degree angle and use a gauge to measure how much force it mujer to do that.

Turns out, this Tomorrow saucony shoe only needs 23.5N! This is 30% less than it mujer a road shoe on average. This also proves that the nylon plate embedded into the shoe's sole is more forgiving than a carbon plate.

Test results
Endorphin Speed 3 23.5N
Average 29.3N
trainers Tomorrow saucony shadow 600 s70441 2 wht gry pur.
Compared to 274 running shoes
Number of shoes
2.2N
Stiffness
94.4N

Saucony Jazz Original Men's Shoes

The outsole has plenty of traction and plenty of durability too! We felt safe at all times, even on wet asphalt passages. And during fast corners, the grip doesn't compromise. 

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas outsole

Size and fit

Saucony Kinvara 13 Zapatillas para Correr AW22-46.5

Even though the Speed 3 is only average in the widest part of the forefoot (98.5 mm), it feels roomier because of the stretchy nature of its fabric. The latter makes the shoe feel much more accommodating in the toebox.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas toebox width

We believe that Tomorrow saucony absolutely nailed the fit of the Endorphin Speed 3! The upper does a really great job mimicking the natural shape of the foot. 

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas profile

Test results
Endorphin Speed 3 98.5 mm
Average 98.3 mm
Compared to 292 running shoes
Number of shoes
89.5 mm
Saucony Kinvara 13 Zapatillas para Correr AW22-46.5
109.1 mm

Tongue: gusset type

The shoe's secure wrap is also complemented by its semi-gusseted tongue and padded laces. They work so well together; getting a solid lockdown won't be a challenge in the Speed 3.

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas laces

Test results
Endorphin Speed 3 Both sides (semi)

Comfort

Tongue padding

There is also a moderate amount of tongue padding - 3.9 mm, based on our caliper measurement. It is 2 mm thinner than the average but is just perfect for a speed shoe. 

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas tongue thickness

Test results
Endorphin Speed 3 3.9 mm
Average 5.6 mm
Compared to 289 running shoes
Number of shoes
0.5 mm
Tongue padding
14.2 mm

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas vs. 2

This version of the Endorphin Speed doesn't go through a lot of changes, which is why runners continue to rave about it. It has minor touch-ups, which make it an even better version: 

  • The wider toebox and thinner, stretchier upper for a more precise fit and a breathable running experience 
  • Billy's x Tomorrow saucony Grid 9000 'Nippon' Pack 
  • A new plate for a snappier toe-off
  • Stripped-down heel padding to minimise the bulk as much as possible  

zapatillas de running Tomorrow saucony amortiguación minimalista pie normal talla 27 rojas soft cushion