Products
Saucony Endorphin Speed 4
adidas Adizero Boston 12
Tested using Methodology v0.8.2
Updated Oct 21, 2025 07:02 PM
SEE PRICE
Saucony
Tested using Methodology v0.8.2
Updated Oct 21, 2025 07:30 PM
SEE PRICE
Amazon.com
Weight
240.6 g (8.49 oz)
Heel-To-Toe Drop
6.4 mm
Plate
Plastic
Weight
265.3 g (9.36 oz)
Heel-To-Toe Drop
7.7 mm
Plate
Fiberglass Rods
Our Verdict
Saucony Endorphin Speed 4
adidas Adizero Boston 12
The Saucony Endorphin Speed 4 and the adidas Adizero Boston 12 are both versatile, stable daily trainers but differ notably in feel and cushioning. The Saucony provides more cushioning, a softer midsole, and better energy return, making it smoother and more responsive for faster workouts or races. It's also lighter than the adidas, making it a more versatile partner for daily runs.
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 12 (Black/White/Carbon - (Men - US 9))
- Adizero Boston 12 (Black/Zero Metallic/Spark - (Men - US 9))
- Adizero Boston 12 (Black/Zero Metallic/Spark - (Women - US 7))
- Adizero Boston 12 (Blue Spark/Zero Metallic/Cobalt Blue - (Women - US 7))
- Adizero Boston 12 (Cloud White/Aurora Met./Solar Red - (Men - US 9))
- Adizero Boston 12 (Cobalt Blue/Zero Metallic/Lucid Blue - (Men - US 9))
- Adizero Boston 12 (Core Black/Cloud White/Carbon - (Women - US 7))
- Adizero Boston 12 (Dash Grey/Lucid Red/Lucid Lemon - (Men - US 9))
- Adizero Boston 12 (Preloved Ink/Zero Metallic/Aurora Ink - (Women - US 7))
- Adizero Boston 12 (Sandy Pink/Aurora Met./Solar Red - (Women - US 7))
- Adizero Boston 12 (Silver Violet/Cloud White/Silver Daw - (Women - US 7))
- Adizero Boston 12 (White/Dark Blue/Pure Ruby - (Men - US 9))
Main Differences for
Marathon Racing
Marathon Racing
Threshold
Marathon Racing
7.8
6.8
Heel Energy Return
8.2
4.2
Forefoot Energy Return
8.4
7.2
Weight
6.8
5.8
Forefoot Stack Height
30.8 mm
28.9 mm
Heel Stack Height
37.2 mm
36.6 mm
Plate
Plastic
Fiberglass Rods
Full Comparison
Design
Weight
6.8
5.8
Right Shoe Weight Photo
Left Shoe Weight Photo
Weight
240.6 g (8.49 oz)
265.3 g (9.36 oz)
Stack Heights
Stack Height Photo
Heel Stack Height
37.2 mm
36.6 mm
Forefoot Stack Height
30.8 mm
28.9 mm
Heel-To-Toe Drop
6.4 mm
7.7 mm
Advertised Heel-To-Toe Drop
8.0 mm
7.0 mm
External Shape
3D Model Full Shoe
Outsole Heel Width
92 mm (3.6")
83 mm (3.2")
Outsole Arch Width
67 mm (2.6")
68 mm (2.7")
Outsole Forefoot Width
113 mm (4.5")
114 mm (4.5")
Heel Width-To-Stack Ratio
2.47
2.26
Forefoot Width-To-Stack Ratio
3.67
3.94
Internal Shape
3D Model Internal
Internal Length
275 mm (10.8")
272 mm (10.7")
Internal Heel Width
59 mm (2.3")
61 mm (2.4")
Internal Forefoot Width
91 mm (3.6")
93 mm (3.7")
Wide Sizing Available
No
Yes
Other Features
Other Features Photo
Tongue Gusset Type
Fully-gusseted
Semi-gusseted
Plate
Plastic
Fiberglass Rods
Performance
Heel Energy Return
8.2
4.2
Heel Compression Video
Heel Energy Return
Heel Energy Return
82.1%
70.8%
Forefoot Energy Return
8.4
7.2
Forefoot Compression Video
Forefoot Energy Return
Forefoot Energy Return
83.1%
76.8%
Heel Cushioning
7.0
6.1
Heel Cushioning Picture
Heel Cushioning
Energy Absorbed At 550N
2.85 J
2.70 J
Energy Absorbed At 1100N
8.84 J
7.81 J
Energy Absorbed At 1900N
15.67 J
13.87 J
Forefoot Cushioning
6.7
6.7
Forefoot Cushioning Picture
Forefoot Cushioning
Energy Absorbed At 800N
4.00 J
3.95 J
Energy Absorbed At 1300N
7.23 J
7.26 J
Energy Absorbed At 2050N
10.91 J
11.02 J
Heel Firmness
5.8
6.4
Heel Firmness
Firmness At 550N
55.8 N/mm
64.5 N/mm
Firmness At 1100N
106.9 N/mm
123.6 N/mm
Firmness At 1900N
251.9 N/mm
257.1 N/mm
Forefoot Firmness
8.3
8.2
Forefoot Firmness
Firmness At 800N
116.9 N/mm
113.4 N/mm
Firmness At 1300N
223.9 N/mm
217.7 N/mm
Firmness At 2050N
448.2 N/mm
427.8 N/mm
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Saucony Endorphin Speed 4
adidas Adizero Boston 12
Comments
Saucony Endorphin Speed 4 vs adidas Adizero Boston 12: Main Discussion
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