Saucony Endorphin Speed 4 vs adidas Adizero Boston 13

Which Running Shoe Is Better?

Products

Saucony Endorphin Speed 4
adidas Adizero Boston 13

Tested using Methodology v0.8.2

Updated Oct 21, 2025 07:02 PM

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Saucony

Tested using Methodology v0.9

Updated Oct 27, 2025 04:34 PM

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Adidas.com

Our Verdict

Saucony Endorphin Speed 4

adidas Adizero Boston 13

The Saucony Endorphin Speed 4 and adidas Adizero Boston 13 are both versatile, plated trainers that can handle everything from steady daily miles to faster workouts, but they lean into slightly different strengths. The Saucony is lighter and more energetic, featuring a softer, more cushioned heel and a more bouncy feel. Its plastic plate is a bit less stiff than the adidas' ENERGYRODS. The Boston 13, on the other hand, is built for those who prefer a firmer feel in the heel and a more connected ride overall. It's also slightly heavier than the Saucony, so overall, the Saucony is the better performer in most use cases, while the Boston 13 offers a classic, workhorse feel that's great for runners who want a firmer, more grounded ride during tempo efforts.

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Variants

  • Endorphin Speed 4 (Black - (Men - US 9))
  • Endorphin Speed 4 (Black - (Women - US 7))
  • Endorphin Speed 4 (Citron/Navy - (Men - US 9))
  • Endorphin Speed 4 (Dusk/Peel - (Women - US 7))
  • Endorphin Speed 4 (Ice Melt - (Women - US 7))
  • Endorphin Speed 4 (Lupine/Cavern - (Women - US 7))
  • Endorphin Speed 4 (Moon/Plum - (Women - US 7))
  • Endorphin Speed 4 (Navy/Fuchsia - (Women - US 7))
  • Endorphin Speed 4 (Navy/Pepper - (Men - US 9))
  • Endorphin Speed 4 (Navy/Spice - (Men - US 9))
  • Endorphin Speed 4 (Olivine - (Men - US 9))
  • Endorphin Speed 4 (Pepper/Navy - (Men - US 9))
  • Endorphin Speed 4 (Shadow - (Men - US 9))
  • Endorphin Speed 4 (Shadow - (Women - US 7))
  • Endorphin Speed 4 (Sunny/Ballad - (Women - US 7))
  • Endorphin Speed 4 (Synergy/Aqua - (Men - US 9))
  • Endorphin Speed 4 (Synergy/Aqua - (Women - US 7))
  • Endorphin Speed 4 (ViZiBlue/Navy - (Men - US 9))
  • Endorphin Speed 4 (ViZiBlue/Silver - (Women - US 7))
  • Endorphin Speed 4 (White/Gold - (Men - US 9))
  • Endorphin Speed 4 (White/Gold - (Women - US 7))
  • Endorphin Speed 4 (White/Gum - (Men - US 9))
  • Endorphin Speed 4 (White/Gum - (Women - US 7))
  • Endorphin Speed 4 (White/Navy - (Men - US 9))
  • Endorphin Speed 4 (White/Navy - (Women - US 7))
  • Endorphin Speed 4 (White/Peel - (Men - US 9))
  • Endorphin Speed 4 (White/Sunny - (Women - US 7))
  • Endorphin Speed 4 (White/ViZiBlue - (Men - US 9))
  • Endorphin Speed 4 (White/ViZiBlue - (Women - US 7))
  • Endorphin Speed 4 (White/ViZiOrange - (Men - US 9))
  • Endorphin Speed 4 (White/Violet - (Women - US 7))
  • Adizero Boston 13 (Black/Cloud White/Grey - (Men - US 9))
  • Adizero Boston 13 (Chalk White/Gold Metallic/Orange Tint - (Women - US 7))
  • Adizero Boston 13 (Cloud White/Black/Lucid Red - (Men - US 9))
  • Adizero Boston 13 (Cloud White/Core Black/Lucid Red - (Men - US 9))
  • Adizero Boston 13 (Cloud White/Core Black/Lucid Red - (Women - US 7))
  • Adizero Boston 13 (Cloud White/Matte Silver/Dash Grey - (Women - US 7))
  • Adizero Boston 13 (Cloud White/Pure Teal/Grey - (Men - US 9))
  • Adizero Boston 13 (Cloud White/Pure Teal/Grey - (Women - US 7))
  • Adizero Boston 13 (Core Black/Cloud White/Grey Five - (Men - US 9))
  • Adizero Boston 13 (Flash Aqua/Cloud White/Lucid Lemon - (Men - US 9))
  • Adizero Boston 13 (Halo Silver/Silver Metallic/Blue - (Women - US 7))
  • Adizero Boston 13 (Lucid Blue/Lime Burst/Black - (Men - US 9))
  • Adizero Boston 13 (Lucid Lemon/Black/Halo Silver - (Men - US 9))
  • Adizero Boston 13 (Semi Flash Aqua/Zero Metalic/Lucid Lemon - (Women - US 7))
  • Adizero Boston 13 (White/Matte Silver/Dash Grey - (Women - US 7))
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Main Differences for
Marathon Racing

Threshold 

0.10

Marathon Racing 

7.8
7.2

Heel Stack Height 
 

37.2 mm
35.9 mm

Forefoot Stack Height 
 

30.8 mm
29.1 mm

Heel Energy Return 
 

8.2
6.7

Weight  

6.8
6.3

Plate 
 

Plastic
Carbon Fiber Rods

Forefoot Energy Return 
 

8.4
8.0

Full Comparison

Design

Weight  

6.8
6.3

Right Shoe Weight Photo  

Left Shoe Weight Photo  

Weight 
 

240.6 g (8.49 oz)
252.2 g (8.90 oz)
Show Text 

Stack Heights 
 

Stack Height Photo  

Heel Stack Height 
 

37.2 mm
35.9 mm

Forefoot Stack Height 
 

30.8 mm
29.1 mm

Heel-To-Toe Drop 
 

6.4 mm
6.8 mm

Advertised Heel-To-Toe Drop 
 

8.0 mm
6.0 mm

External Shape 
 

3D Model Full Shoe  

Outsole Heel Width 
 

92 mm (3.6")
83 mm (3.3")

Outsole Arch Width 
 

67 mm (2.6")
62 mm (2.4")

Outsole Forefoot Width 
 

113 mm (4.5")
122 mm (4.8")

Heel Width-To-Stack Ratio 
 

2.47
2.31

Forefoot Width-To-Stack Ratio 
 

3.67
4.19
Show Text 

Internal Shape 
 

3D Model Internal  

Internal Length 
 

275 mm (10.8")
277 mm (10.9")

Internal Heel Width 
 

59 mm (2.3")
63 mm (2.5")

Internal Forefoot Width 
 

91 mm (3.6")
97 mm (3.8")

Wide Sizing Available 
 

No
No
Show Text 

Other Features  

Other Features Photo  

Tongue Gusset Type 
 

Fully-gusseted
Semi-gusseted

Plate 
 

Plastic
Carbon Fiber Rods
Performance

Heel Energy Return 
 

8.2
6.7

Heel Compression Video  

Heel Energy Return  

See details
See details

Heel Energy Return 
 

82.1%
75.1%
Show Text 

Forefoot Energy Return 
 

8.4
8.0

Forefoot Compression Video  

Forefoot Energy Return  

See details
See details

Forefoot Energy Return 
 

83.1%
80.8%
Show Text 

Heel Cushioning 
 

7.0
5.9

Heel Cushioning Picture  

Heel Cushioning  

See details
See details

Energy Absorbed At 550N 
 

2.85 J
2.76 J

Energy Absorbed At 1100N 
 

8.84 J
7.59 J

Energy Absorbed At 1900N 
 

15.67 J
13.09 J
Show Text 

Forefoot Cushioning 
 

6.7
6.6

Forefoot Cushioning Picture  

Forefoot Cushioning  

See details
See details

Energy Absorbed At 800N 
 

4.00 J
4.14 J

Energy Absorbed At 1300N 
 

7.23 J
7.08 J

Energy Absorbed At 2050N 
 

10.91 J
10.17 J
Show Text 

Heel Firmness 
 

5.8
6.8

Heel Firmness  

See details
See details

Firmness At 550N 
 

55.8 N/mm
65.5 N/mm

Firmness At 1100N 
 

106.9 N/mm
133.0 N/mm

Firmness At 1900N 
 

251.9 N/mm
299.2 N/mm
Show Text 

Forefoot Firmness 
 

8.3
8.7

Forefoot Firmness  

See details
See details

Firmness At 800N 
 

116.9 N/mm
120.7 N/mm

Firmness At 1300N 
 

223.9 N/mm
257.3 N/mm

Firmness At 2050N 
 

448.2 N/mm
541.9 N/mm
Show Text 

Forefoot Long Run Cushioning 
 

5.9

Forefoot Long Run Cushioning  

See details

Energy Absorbed At 10km 
 

6.47 J

Energy Absorbed At 20km 
 

6.30 J

Energy Absorbed At 30km 
 

6.21 J

Energy Absorbed At 40km 
 

6.12 J

Saucony Endorphin Speed 4

adidas Adizero Boston 13

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  1. Comparison

Saucony Endorphin Speed 4 vs adidas Adizero Boston 13: Main Discussion

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