Home / Road running shoes / Saucony Endorphin Pro 2

Saucony Endorphin Pro 2 Review (2021)

Saucony Endorphin Pro 2

The Saucony Endorphin Pro is an elite shoe with a carbon plate. It offers a very responsive ride and firm cushioning ideal for the half marathon.


Discover the latest version: Saucony Endorphin Pro 4!

9.2Overall score
Very good carbon-fiber plate running shoe for an impressive ride despite the firm cushioning
The Saucony Endorphin Pro 2 arrives with a bang, but runners were not as impressed as with the first version. Indeed, it’s important to note that carbon shoes are maturing with a lot of models now available. On the other hand, this second version doesn’t change much; we feel that Saucony wanted to play it safe in order not to break its toy (which is understandable). So let’s review what runners have to say about it.

Foot lockdown (upper)
Let’s start with the upper that concentrates most of the changes. There’s a thin, soft engineered mesh with little stretch for a precise foot lockdown at high speed. The shoe is better ventilated with more perforations to let the air circulate. One of the weak points of the first version was its heel that could let the foot slip. The Endorphin Pro 2 has a more padded and better fitting collar to effectively correct the problem. On the other hand, the upper is more spacious but still a bit narrow around the forefoot. Unfortunately, this depends more on the shape of your foot than its width. So we suggest you try it on in store if possible. Finally, the half-bellow tongue is flexible and wraps the top of the foot well. In short, more safety and comfort!

So, what does the midsole and its carbon fiber plate have in store for us? We find the same PWRRUN PB technology, a Peba-based foam. Simply put, this is a type of low-density elastomer that offers an impressive energy return. It’s a material that is increasingly replacing EVA foam. On the Endorphin Pro 2, it provides firm (some say even “hard”) cushioning with an impressive bounce to go with it. Combined with the Speedroll technology and aggressive rocker design, the result is an explosive ride to go fast. The comfort may not be on par with Nike’s Vaporfly Next or Adidas’ Adios Pro, but it will appeal to athletes who prefer a firm underfoot feel. The Endorphin Pro 2 delivers a constant forward motion, but you need to go fast enough for it to kick in. Thus, testers noted an impressive ride at fast paces but a somewhat clunky feel at slow paces.

Overall, based on our analysis of the various tests, we recommend the SEP2 for running up to the half marathon. Marathon running is of course possible, but only if you can tolerate firm cushioning over longer distances.

Grip and durability
There are also very few changes on the outsole’s side. The shoe still offers good traction even when the road is slippery. The thick carbon rubber zones provide superior durability for a carbon model. The testers speak of a minimum of 300 miles easy, not bad!

The Saucony Endorphin Pro 2 is the brand’s elite shoe. Built for competition, this second version is pretty much identical to the first, except for the upper. It was redesigned to correct the negative points and to be suitable for more runners. If the Endorphin Pro was too narrow for you, then try the 2! For the rest, the ride is ultra-bouncy but with a firm feel. Finally, as it’s the case with the vast majority of carbon-plated shoes, the price is steep at $220. The value remains reasonable thanks to the good durability.
Value for money
  • Great comfort
  • Improved upper: slightly more spacious with better heel lockdown
  • Very responsive ride’s responsiveness
  • Good durability for this type of shoe
  • Shoe profile remains classic in terms of configuration
  • Firm cushioning that may not be suitable for everyone
  • The upper is still a bit narrow


Saucony Endorphin Pro 2 review


Saucony Endorphin Pro 2 rubber outsole

Carbon rubber: a very robust type of rubber that allows the shoe to better resist abrasion on the road. It thus allows the life of the shoe. The area under the heel is particularly prone to rapid damage as this is where most athletes strike the ground.


Saucony Endorphin Pro 2

The midsole features PWRRUN PB: thousands of granules of PEBA (or Pebax), a flexible, naturally responsive, low-density elastomer that is bonded together and wraps around the sole’s carbon plate propulsion. According to Saucony, this configuration is 20% lighter than conventional TPU materials.

SpeedRoll: A slim design that aims to make the midsole’s foam and carbon plate work efficiently to achieve fast propulsion with their smooth transition from heel to forefoot. One result of this configuration is a firm forefoot and a thick sole to facilitate the rocker effect.

Carbon plate is a technology that has been successful since 2020. It aims to make the ride more responsive and stable to go as fast as possible.


Saucony Endorphin Pro 2 midsole cushioning

The engineered mesh upper provides an efficient foot lockdown while allowing good air circulation inside the shoe.

Saucony Endorphin Pro 2 mesh upper

Formfit: an overlay system that aims to improve foot lockdown for better stability. Designed to replace ISOFIT, FORMFIT offers a firmer and more fitted foot lockdown. This system also has the advantage of improving the durability of the upper by giving it a better structure.


Technical Specs

Pronation typeNeutral
Drop8 mm
Heel stack height36 mm
Forefoot stack height28 mm
Weight (men)213 g/7.5 oz
Weight (women)179 g/6.3 oz
FeaturesRocker, Carbon plate, Vegan
AthletesMolly Seidel
Release year2021


Softness (1-5)2 – Firm
Bounce (1-5)5 – Very bouncy


OutsoleCarbon rubber
MidsoleCarbon plate, PWRRUN PB, SPEEDROLL
UpperFORMFIT, Engineered Mesh


SpeedModerate, fast
DistanceShort, mid, 5k, 10k, half marathon

Reference: Saucony’s official website


Saucony Endorphin Pro

The Endorphin Pro 2 changes little compared to the first version. The upper is a little bit more spacious and the lockdown in the heel is better. For the rest, the sole and the ride feel are almost identical.

Saucony Endorphin Speed 2

Coming soon!

Nike ZoomX Vaporfly Next% 2

See the side-by-side comparison with our comments.

Adidas Adizero Adios Pro

See the side-by-side comparison with our comments.

Frequently Asked Questions (FAQs)

How’s the fit of the Saucony Endorphin Pro 2 shoes?

This shoe runs true to size according to the reviews we have seen so far. So you can go with your normal size for road shoes. That said, the forefoot is a bit narrow and not suitable for all runners. So it’s best to try it on to be sure.

Is this model suitable for athletes who overpronate?

Yes, this model is a neutral running shoe (also called universal). Thus, it is intended for all athletes independently from your pronation. It does not have a specific correction to avoid overpronation. However, its fairly firm cushioning makes it fairly stable so it may be suitable even if you are an overpronator (check for yourself).

Is this road model suitable for athletes with a high weight (80 kg 176 lbs or more)?

Yes, this model should be suitable for all weights with its thick sole (36 mm heel stack height) and its firm platform that does not sag under the weight of the runner.

Are these shoes recommended for running a marathon?

This running shoe is primarily intended for fast sessions and medium distances because of its firm cushioning. It is possible to use it for a marathon (that’s what Saucony athletes like Molly Seidel do) but it’s better to test it on a few long runs first to be sure.

Photo of author

Kevin Le Gall

Kevin is the founder and editor of Runner's Lab. He started running in 2015 and completed his first marathon in Rotterdam in 2016. He's also worked for Under Armour from 2016 to 2018 and helped launch their running collection in Europe (in particular the HOVR shoes). In addition, Kevin is a 300-hour certified yoga teacher (Sivananda) and uses this experience to run more mindfully with a focus on well-being over performance.

Leave a Comment