Saucony Endorphin Pro 4 vs Nike Alphafly 3

Which Running Shoe Is Better?

Products

Saucony Endorphin Pro 4
Nike Alphafly 3

Tested using Methodology v0.9

Updated Nov 14, 2025 09:26 PM

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Saucony

Tested using Methodology v0.9

Updated Nov 03, 2025 05:03 PM

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Nike.com
  1. Recommended in 1 article:
  2. Nike

Our Verdict

Saucony Endorphin Pro 4

Nike Alphafly 3

The Nike Alphafly 3 and the Saucony Endorphin Pro 4 are both high-performance racing shoes, but they cater to different types of runners and preferences. The Saucony is stiffer in the forefoot, providing a more structured toe-off. It also offers slightly better lateral stability than the Nike, benefiting runners who need extra support during turns. Additionally, its geometry is particularly well-suited for heel strikers. On the other hand, the Nike shoe is lighter while still delivering better cushioning, maximizing efficiency over long distances. While the Saucony is an excellent option for both racing and versatile enough for workouts, the Nike remains hard to beat for those prioritizing raw speed and performance.

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Variants

  • Endorphin Pro 4 (Cavern/Violet - (Women - US 7))
  • Endorphin Pro 4 (Citron/Silver - (Men - US 9))
  • Alphafly 3 (Black/Olive Aura/Metallic Silver - (Men - US 9))
  • Alphafly 3 (Bright Crimson/Lime Blast/Mint Foam/Cave Purple - (Men - US 9))

Main Differences for
Marathon Racing

Threshold 

0.10

Marathon Racing 
 

8.3
8.5
No major differences between these running shoes for marathon racing. See full list of tests below.

Full Comparison

Design

Weight  

7.7
8.1

Right Shoe Weight Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Right Shoe Weight Photo
Compare High-Res
Nike Alphafly 3 Right Shoe Weight Photo

Left Shoe Weight Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Left Shoe Weight Photo
Compare High-Res
Nike Alphafly 3 Left Shoe Weight Photo

Weight 
 

214.9 g (7.58 oz)
200.7 g (7.08 oz)
Show Text 

Stack Heights 
 

Stack Height Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Stack Height Photo
Compare High-Res
Nike Alphafly 3 Stack Height Photo

Heel Stack Height 
 

39.3 mm
39.8 mm

Forefoot Stack Height 
 

30.5 mm
33.4 mm

Heel-To-Toe Drop 
 

8.8 mm
6.4 mm

Advertised Heel-To-Toe Drop 
 

8.0 mm
8.0 mm

External Shape 
 

3D Model Full Shoe  

Preview 3D
Saucony Endorphin Pro 4 3D Model Full Shoe
Preview 3D
Nike Alphafly 3 3D Model Full Shoe

Outsole Heel Width 
 

87 mm (3.4")
91 mm (3.6")

Outsole Arch Width 
 

74 mm (2.9")
68 mm (2.7")

Outsole Forefoot Width 
 

114 mm (4.5")
116 mm (4.6")

Heel Width-To-Stack Ratio 
 

2.21
2.29

Forefoot Width-To-Stack Ratio 
 

3.74
3.47

Internal Shape 
 

3D Model Internal  

Preview 3D
Saucony Endorphin Pro 4 3D Model Internal
Preview 3D
Nike Alphafly 3 3D Model Internal

Internal Length 
 

270 mm (10.6")
273 mm (10.7")

Internal Heel Width 
 

53 mm (2.1")
59 mm (2.3")

Internal Forefoot Width 
 

87 mm (3.4")
90 mm (3.5")

Wide Sizing Available 
 

No
No

Other Features  

Other Features Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Other Features Photo
Compare High-Res
Nike Alphafly 3 Other Features Photo

Tongue Gusset Type 
 

Non-gusseted
Non-gusseted

Plate 
 

Carbon Fiber
Carbon Fiber
Performance

Heel Energy Return 
 

8.4
8.2

Heel Compression Video  

Heel Energy Return  

 Preview Graph
Saucony Endorphin Pro 4 Heel Energy Return
 Preview Graph
Nike Alphafly 3 Heel Energy Return

Heel Energy Return 
 

83.2%
82.0%
Show Text 

Forefoot Energy Return 
 

8.3
8.2

Forefoot Compression Video  

Forefoot Energy Return  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Energy Return
 Preview Graph
Nike Alphafly 3 Forefoot Energy Return

Forefoot Energy Return 
 

82.6%
82.2%
Show Text 

Heel Cushioning 
 

7.4
7.6

Heel Cushioning Picture 
 

Compare High-Res
Saucony Endorphin Pro 4 Heel Cushioning Picture
Compare High-Res
Nike Alphafly 3 Heel Cushioning Picture

Heel Cushioning  

 Preview Graph
Saucony Endorphin Pro 4 Heel Cushioning
 Preview Graph
Nike Alphafly 3 Heel Cushioning

Energy Absorbed At 550N 
 

3.14 J
3.82 J

Energy Absorbed At 1100N 
 

9.21 J
9.18 J

Energy Absorbed At 1900N 
 

16.16 J
14.96 J
Show Text 

Forefoot Cushioning 
 

7.1
8.0

Forefoot Cushioning Picture 
 

Compare High-Res
Saucony Endorphin Pro 4 Forefoot Cushioning Picture
Compare High-Res
Nike Alphafly 3 Forefoot Cushioning Picture

Forefoot Cushioning  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Cushioning
 Preview Graph
Nike Alphafly 3 Forefoot Cushioning

Energy Absorbed At 800N 
 

4.33 J
4.68 J

Energy Absorbed At 1300N 
 

7.59 J
8.55 J

Energy Absorbed At 2050N 
 

11.50 J
13.10 J
Show Text 

Heel Firmness 
 

5.6
5.9

Heel Firmness  

 Preview Graph
Saucony Endorphin Pro 4 Heel Firmness
 Preview Graph
Nike Alphafly 3 Heel Firmness

Firmness At 550N 
 

55.2 N/mm
49.4 N/mm

Firmness At 1100N 
 

103.1 N/mm
129.6 N/mm

Firmness At 1900N 
 

250.7 N/mm
277.3 N/mm
Show Text 

Forefoot Firmness 
 

8.1
7.4

Forefoot Firmness  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Firmness
 Preview Graph
Nike Alphafly 3 Forefoot Firmness

Firmness At 800N 
 

115.3 N/mm
103.1 N/mm

Firmness At 1300N 
 

215.0 N/mm
170.1 N/mm

Firmness At 2050N 
 

416.1 N/mm
370.8 N/mm
Show Text 

Forefoot Long Run Cushioning 
 

6.5
7.8

Forefoot Long Run Cushioning  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Long Run Cushioning
 Preview Graph
Nike Alphafly 3 Forefoot Long Run Cushioning

Energy Absorbed At 10km 
 

7.05 J
8.41 J

Energy Absorbed At 20km 
 

6.93 J
8.33 J

Energy Absorbed At 30km 
 

6.84 J
8.27 J

Energy Absorbed At 40km 
 

6.76 J
8.24 J
Show Text 

Saucony Endorphin Pro 4

Nike Alphafly 3

Comments

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Saucony Endorphin Pro 4 vs Nike Alphafly 3: Main Discussion

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