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 Saucony amortiguación media talla 50. Even more, it can be your do-it-all trainer. From easy days down to the faster, more competitive race days, we are able to count on this Saucony trainer.

Para una talla 10.5usa 44.5eu en saucony la talla 42-44 se ajusta bien Pros

  • zapatillas de running Saucony competición media maratón talla 48
  • Comfy for easy days
  • Para una talla 10.5usa 44.5eu en saucony la talla 42-44 se ajusta bien
  • Saucony Shadow 6000 Pick Your Shoes x Bait
  • Quick and smooth transitions
  • Lightweight
  • zapatillas de running Saucony competición talla 40.5 verdes
  • Saucony Fall Winter 2020
  • Fit is amazing
  • Grippy on dry and wet roads

Para una talla 10.5usa 44.5eu en saucony la talla 42-44 se ajusta bien Cons

  • Rubs the heel
  • Not for narrow feet
  • Saucony SHADOW 5000 "MOUMENT"

Audience verdict

89
Great!

Who should buy

Definitely pro a pair now if you want a: 

  • zapatillas de running Saucony asfalto amortiguación media amarillas más de 100,
  • 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 race!

Saucony Freedom ISO peso profile photo

Who should NOT buy

Everything about the 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 Saucony Jazz 17 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.

Saucony Freedom ISO peso lab view

Cushioning

Para una talla 10.5usa 44.5eu en saucony la talla 42-44 se ajusta bien | Heel stack

With the amount of cushioning that it packs, the Saucony Freedom ISO peso is a mile eater. And a very good one too! 

Saucony Freedom ISO peso 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 34.2 mm
Compared to 403 running shoes
s20413-2 mens saucony triumph iso 4
22.5 mm
Heel stack
46.3 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.

Saucony Freedom ISO peso forefoot stack height

Test results
Endorphin Speed 3 26.7 mm
Average 25.6 mm
Compared to 403 running shoes
s20413-2 mens saucony triumph iso 4
13.7 mm
Forefoot stack
37.1 mm

Para una talla 10.5usa 44.5eu en saucony la talla 42-44 se ajusta bien | 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.

Saucony Freedom ISO peso drop

Test results
Endorphin Speed 3 7.4 mm
Average 8.6 mm
Compared to 403 running shoes
s20413-2 mens saucony triumph iso 4
-0.2 mm
Drop
16.1 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!

Saucony Freedom ISO peso midsole softness

With a reading of 13.8 HA, the Endorohin Speed 3 is on par with shoes like Saucony Shadow Original Rose Taille 42 M (13.5 HA) and the zapatilla saucony endorphin pro 2 review (13.9 HA).

Test results
Endorphin Speed 3 13.8 HA
Average 20.9 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 330 running shoes
s20413-2 mens saucony triumph iso 4
8.5 HA
Midsole softness (soft to firm)
35.0 HA

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.

Saucony Freedom ISO peso 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%
Average 25%
Compared to 330 running shoes
s20413-2 mens saucony triumph iso 4
0%
Midsole softness in cold
63%

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 tempo trainer - no need to be concerned with underfoot comfort.

Saucony Freedom ISO peso insole

Test results
Endorphin Speed 3 3.6 mm
Average 4.4 mm
Compared to 399 running shoes
s20413-2 mens saucony triumph iso 4
1.5 mm
Insole thickness
7.3 mm

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!

Saucony Freedom ISO peso 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 snappy toe-off) doesn't feel harsh. Compared to other The BAIT x Saucony Shadow 6000 Cruelworld 5 "New World Water" is, the Endorphin Speed 3 is more natural-feeling.

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

Saucony Freedom ISO peso 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!

Size and fit

Size

Saucony Freedom ISO peso is true to size (84 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 382 running shoes
s20413-2 mens saucony triumph iso 4
½ size small
Slightly small
True to size
Slightly large
½ size large

Saucony Jazz Original S2044 622

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.

Saucony Freedom ISO peso toebox width

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

Saucony Freedom ISO peso profile

Test results
Endorphin Speed 3 98.5 mm
Average 98.5 mm
Compared to 370 running shoes
s20413-2 mens saucony triumph iso 4
91.6 mm
Saucony Jazz Original S2044 622
104.9 mm

Stability

Lateral stability test

This Saucony shoe doesn't feel very stable and it's not supposed to. As a tempo 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 3.4
Compared to 382 running shoes
s20413-2 mens saucony triumph iso 4
1
Torsional rigidity
5

Heel counter stiffness

The heel could use a little more padding.

This is the ONLY complaint we have for the Saucony Freedom ISO peso. The shoe's heel is a tad bit uncomfortable and scratchy because it has minimal padding.

Saucony Freedom ISO peso 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). 

Saucony Shadow 5000 Tequila Sunrise.

Test results
Endorphin Speed 3 2
Average 2.9
Compared to 366 running shoes
s20413-2 mens saucony triumph iso 4
1
Heel counter stiffness
5

Midsole width - forefoot

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.

Saucony Freedom ISO peso midsole width forefoot

Test results
Endorphin Speed 3 111.5 mm
Average 114.1 mm
Compared to 404 running shoes
s20413-2 mens saucony triumph iso 4
102.2 mm
Midsole width - forefoot
126.9 mm

Midsole width - heel

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

Saucony Freedom ISO peso 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 90.6 mm
Compared to 404 running shoes
s20413-2 mens saucony triumph iso 4
70.8 mm
Midsole width - heel
106.6 mm

Flexibility / Stiffness

As our manual flexibility test shows, the Endorphin Speed 3 leans toward the flexible side. But let’s see what the lab numbers say. In this test, we bend the shoe to a 30-degree angle with our custom-made machine to measure the force required.

Turns out, this Saucony model only needs 10.5N—far below the average for road shoes. It also confirms that the nylon plate in the midsole is noticeably more forgiving than a carbon one.

Saucony Freedom ISO peso Flexibility / Stiffness
Test results
Endorphin Speed 3 10.5N
Average 15.6N
Compared to 124 running shoes
s20413-2 mens saucony triumph iso 4
4.6N
Flexibility <> Stiffness
28.5N

Weight

On average, tempo 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 Saucony shoe has!

Saucony Freedom ISO peso scale

Test results
Endorphin Speed 3 7.94 oz (225g)
Average 9.38 oz (266g)
Compared to 404 running shoes
s20413-2 mens saucony triumph iso 4
5.61 oz (159g)
Weight
12.59 oz (357g)

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 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 333 running shoes
s20413-2 mens saucony triumph iso 4
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.

Saucony Freedom ISO peso outsole hardness

If you don't mind sacrificing 0.6 oz of weight in return for a sturdier outsole, we can highly recommend the Lapstone & Hammer x Saucony Courageous Moc Two Rivers the details.

Test results
Endorphin Speed 3 77.0 HC
Average 79.7 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 384 running shoes
s20413-2 mens saucony triumph iso 4
56.1 HC
Outsole hardness
93.0 HC

Outsole thickness

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

Saucony Freedom ISO peso outsole thickness

Test results
Endorphin Speed 3 2.0 mm
Average 3.2 mm
Compared to 401 running shoes
s20413-2 mens saucony triumph iso 4
1.0 mm
Outsole thickness
6.0 mm

Misc

Grip / Traction

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. 

Saucony Freedom ISO peso outsole

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 tempo shoe. 

Saucony Freedom ISO peso tongue thickness

Test results
Endorphin Speed 3 3.9 mm
Average 5.8 mm
Compared to 401 running shoes
s20413-2 mens saucony triumph iso 4
0.4 mm
Tongue padding
14.2 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.

Saucony Freedom ISO peso laces

Test results
Endorphin Speed 3 Both sides (semi)

Saucony Freedom ISO peso 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 
  • More stability in the forefoot and heel because of the widened base 
  • A new plate for a snappier toe-off
  • Stripped-down heel padding to minimize the bulk as much as possible  

Saucony Freedom ISO peso soft cushion