Written by

Brandon Law

Marathon Runner and Shoe Expert
The Endorphin Speed is a trainer designed for speedwork. It's the training companion of the Endorphin Pro. Here we will be comparing the 4th version and the 3rd version.
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The Endorphin Speed has taken the world by storm. It has a very lightweight build, a super foam midsole and a nylon plate. It's no wonder it has become one of the most popular Saucony trainers.

This comparison will tell you if the Endorphin Speed 4 or the Endorphin Speed 3 is the better trainer for you.

Similarity and differences: Endorphin Speed 4 vs Endorphin Speed 3

Endorphin Speed 4

Endorphin Speed 3

Expert score
Expert score
Expert score
8 oz
8.10 oz
Heel Drop
8 mm
8 mm
The Saucony Endorphin Speed 4 is a flexible, plated trainer which is best suited to uptempo runs. It doesn’t offer as much speed assistance as other plated trainers but it has a natural ride with excellent traction. Version 4 feels faster than version 3 due to its firmer ride. It has a higher level of ground feel and a more streamlined design.
The Saucony Endorphin Speed 3 is a multipurpose trainer/racer which can fill many roles in your rotation. Its nylon plate doesn't provide the propulsion that carbon racers have but it's still a very fast shoe. Version 3 has a more stable platform with a softer and more relaxed ride. It's now more of a daily trainer than a speedwork shoe.
Recommended for
Racing, speedwork, daily training
Cushioning type
Cushioning amount
Medium cushioning
Highly cushioned
some stability
some stability
true to size
true to size
Retail price

Sole unit: Endorphin Speed 4 vs Endorphin Speed 3

Both versions use PWRRUN PB in their midsoles which is one of Saucony’s premium racing foams. It is a beaded PEBA foam and has very high energy return. The main difference is that the midsole of the Speed 4 is firmer than the midsole of the Speed 3.

The firmer midsole of the Speed 4 results in a faster ride. It’s better for short, fast runs compared to the Speed 3 which has a softer ride and more suited to relaxed runs. The Speed 3 is better for slow and long runs.

The Speed 4 has better stability because it has a firmer ride with less lean bias. Your foot strikes feel more planted in the Speed 4.

The ride of the Speed 3 feels smoother but flatter than the 4. The forefoot rocker isn’t as prominent as the rocker of the Speed 4 and in the Speed 4, you can feel the plate more.

The Speed 4 has the better outsole. The rubber on its forefoot has lugs which protrude and bite into the ground better than the flatter profile rubber on the forefoot of the Speed 3 so traction is much better in the Speed 4.

Upper unit: Endorphin Speed 4 vs Endorphin Speed 3

The upper of the Speed 4 is thinner and more breathable than the Speed 3. The Speed 3 has a little more padding which makes it more comfortable for long runs.

Both trainers have flat tongues but the Speed 3’s tongue moves around during runs while the Speed 4 stays in place. They both fit true to size and they are also available in wide versions.

Which one to buy: Endorphin Speed 4 vs Endorphin Speed 3

If you prefer a faster, firmer ride, the Speed 4 is the shoe for you. It has better stability and it feels more like a speed trainer. It also has better traction. The Speed 4 is best suited to tempo runs, intervals, fartleks and any uptempo run.

If you prefer a softer, more relaxed ride, the Speed 3 is the better shoe for you. It has more cushioning and is better for slow runs and long runs.

This expert review is written by

Brandon Law

Marathon Runner and Shoe Expert
Brandon is a South African who lives and trains in Malaysia. He is a marathon runner who eats, sleeps and dreams running shoes. While most people wear shoes to run, he runs to wear shoes.