Saucony Endorphin Pro 4 vs Nike Alphafly 3

Which Running Shoe Is Better?

Products

Saucony Endorphin Pro 4
Nike Alphafly 3

Tested using Methodology v0.12

Updated Jun 16, 2026 05:25 PM

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Amazon

Tested using Methodology v0.12

Updated Jun 16, 2026 04:00 PM

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Nike.com
Saucony Endorphin Pro 4 Picture

Track

Nike Alphafly 3 Picture

Track

  1. Recommended in 1 article:
  2. Marathon
  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
Half/Full Marathon Racing

Threshold 

0.10

Half/Full Marathon Racing 
 

7.9
8.2

Forefoot Long Run Cushioning 
 

6.5
7.8

Weight  

7.7
8.1

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)

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

Forefoot Fit: Width 
 

9.5
9.4

Forefoot Width Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Forefoot Width Photo
Compare High-Res
Nike Alphafly 3 Forefoot Width Photo

Ball-Of-Foot TTS Deviation 
 

-1.6 mm (-0.063")
-0.8 mm (-0.032")

Toe TTS Deviation 
 

-0.5 mm (-0.018")
-2.2 mm (-0.087")

Forefoot Fit: Height 
 

7.6
9.7

Forefoot Height Photo 
 

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

Toe TTS Deviation 
 

-2.9 mm (-0.113")
-0.8 mm (-0.030")

Arch Fit: Width 
 

10
6.2

Arch Fit Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Arch Fit Photo
Compare High-Res
Nike Alphafly 3 Arch Fit Photo

Arch Width TTS Deviation 
 

0.0 mm (0.000")
-5.6 mm (-0.219")

Length Fit 
 

10
10

Toe Clearance Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Toe Clearance Photo
Compare High-Res
Nike Alphafly 3 Toe Clearance Photo

Heel Rocker Geometry 
 

7.7
6.6

Heel Rocker Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Heel Rocker Photo
Compare High-Res
Nike Alphafly 3 Heel Rocker Photo

Heel Spring 
 

22 mm (0.9")
16 mm (0.6")

Heel Apex Position 
 

20.1%
15.3%

Heel Rocker Angle 
 

21.1°
21.3°

Forefoot Rocker Geometry 
 

8.0
6.7

Forefoot Rocker Photo 
 

Compare High-Res
Saucony Endorphin Pro 4 Forefoot Rocker Photo
Compare High-Res
Nike Alphafly 3 Forefoot Rocker Photo

Toe Spring 
 

57 mm (2.2")
45 mm (1.8")

Toe Apex Position 
 

61.3%
66.4%

Forefoot Rocker Angle 
 

27.4°
26.6°

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 Compression 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%

Forefoot Compression 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%

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

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

Heel Firmness 
 

7.9
7.4

Heel Firmness Graph  

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

Firmness At 550N 
 

44.1 N/mm
38.8 N/mm

Firmness At 1100N 
 

54.7 N/mm
52.3 N/mm

Firmness At 1900N 
 

76.2 N/mm
75.9 N/mm

Forefoot Firmness 
 

8.6
7.9

Forefoot Firmness Graph  

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

Firmness At 800N 
 

61.0 N/mm
57.0 N/mm

Firmness At 1300N 
 

79.8 N/mm
73.1 N/mm

Firmness At 2050N 
 

110 N/mm
99 N/mm

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

Rocker Stiffness 
 

7.9
7.9

Forefoot Rocker Stiffness Video  

Forefoot Rocker Stiffness Graph  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Rocker Stiffness Graph
 Preview Graph
Nike Alphafly 3 Forefoot Rocker Stiffness Graph

Force To Flatten The Rocker 
 

116 N
117 N

Forefoot Bending Energy Return 
 

7.7
8.0

Forefoot Bending Video  

Forefoot Bending Energy Return  

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

Forefoot Bending Energy Return 
 

69.7%
71.3%

Forefoot Bending Stiffness 
 

7.9
9.5

Forefoot Bending Resistance Picture 
 

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

Forefoot Bending Resistance  

 Preview Graph
Saucony Endorphin Pro 4 Forefoot Bending Resistance
 Preview Graph
Nike Alphafly 3 Forefoot Bending Resistance

Forefoot Bending Stiffness 
 

16.9 N/mm
41.6 N/mm

Forefoot Bending Force 
 

332 N
484 N

Saucony Endorphin Pro 4

Nike Alphafly 3

Comments

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