adidas Adizero Adios 9 vs Nike Streakfly 2

Which Running Shoe Is Better?

Products

adidas Adizero Adios 9
Nike Streakfly 2

Tested using Methodology v0.9

Updated Oct 20, 2025 05:51 PM

Amazon.com

Tested using Methodology v0.9

Updated Oct 27, 2025 06:27 PM

Amazon.com

Our Verdict

adidas Adizero Adios 9

Nike Streakfly 2

The Nike Streakfly 2 and the adidas Adizero Adios 9 are both stripped-down speed shoes built for short, fast efforts, but they take different approaches. The Streakfly 2 is much lighter, with a carbon plate and a sharply angled forefoot geometry that gives it a snappy feel reminiscent of track spikes. The Adios 9, while still very light, uses a partial plastic shank instead of a full plate, and its ride is firmer in the forefoot and more grounded with a more traditional flat-racer sensation. Both shoes are firm and snappy underfoot, though the Streakfly 2 feels a bit firmer in the heel.

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Variants

  • Adizero Adios 9 (Cloud White/ ore Black/Silver Metallic - (Men - US 9))
  • Adizero Adios 9 (Cloud White/ ore Black/Silver Metallic - (Women - US 7))
  • Adizero Adios 9 (Lucid Lemon/Core Black/Halo Silver - (Men - US 9))
  • Adizero Adios 9 (Lucid Lemon/Core Black/Halo Silver - (Women - US 7))
  • Streakfly 2 (Bright Crimson/Hyper Orange/Gridiron/Lime Blast - (Men - US 9))
  • Streakfly 2 (Bright Crimson/Hyper Orange/Gridiron/Lime Blast - (Women - US 7))
  • Streakfly 2 (Ghost/Persian Violet/Blue Lightning/Blue Void - (Men - US 9))
  • Streakfly 2 (Ghost/Persian Violet/Blue Lightning/Blue Void - (Women - US 7))
  • Streakfly 2 (Sail/Total Orange/White/Black - (Men - US 9))
  • Streakfly 2 (Sail/Total Orange/White/Black - (Women - US 7))
  • Streakfly 2 (White/Obsidian Mist/Pure Platinum/Gridiron - (Men - US 9))
  • Streakfly 2 (White/Obsidian Mist/Pure Platinum/Gridiron - (Women - US 7))

Main Differences for
Marathon Racing

Threshold 

0.10

Marathon Racing 

6.1
6.6

Plate 
 

Plastic Shank
Carbon Fiber

Weight  

8.9
9.8

Full Comparison

Design

Weight  

8.9
9.8

Right Shoe Weight Photo  

Left Shoe Weight Photo  

Weight 
 

173.1 g (6.10 oz)
121.5 g (4.28 oz)
Show Text 

Stack Heights 
 

Stack Height Photo  

Heel Stack Height 
 

27.1 mm
26.7 mm

Forefoot Stack Height 
 

19.5 mm
22.6 mm

Heel-To-Toe Drop 
 

7.6 mm
4.1 mm

Advertised Heel-To-Toe Drop 
 

7.0 mm
4.0 mm
Show Text 

External Shape 
 

3D Model Full Shoe  

Outsole Heel Width 
 

71 mm (2.8")
71 mm (2.8")

Outsole Arch Width 
 

68 mm (2.7")
48 mm (1.9")

Outsole Forefoot Width 
 

108 mm (4.3")
99 mm (3.9")

Heel Width-To-Stack Ratio 
 

2.69
2.66

Forefoot Width-To-Stack Ratio 
 

5.43
4.38
Show Text 

Internal Shape 
 

3D Model Internal  

Internal Length 
 

274 mm (10.8")
264 mm (10.4")

Internal Heel Width 
 

59 mm (2.3")
55 mm (2.2")

Internal Forefoot Width 
 

88 mm (3.5")
85 mm (3.3")

Wide Sizing Available 
 

No
No
Show Text 

Other Features  

Other Features Photo  

Tongue Gusset Type 
 

Semi-gusseted
Non-gusseted

Plate 
 

Plastic Shank
Carbon Fiber
Show Text 
Performance

Heel Energy Return 
 

7.9
8.3

Heel Compression Video  

Heel Energy Return  

See details
See details

Heel Energy Return 
 

80.1%
82.9%
Show Text 

Forefoot Energy Return 
 

8.2
8.5

Forefoot Compression Video  

Forefoot Energy Return  

See details
See details

Forefoot Energy Return 
 

81.7%
84.0%
Show Text 

Heel Cushioning 
 

4.7
4.3

Heel Cushioning Picture  

Heel Cushioning  

See details
See details

Energy Absorbed At 550N 
 

2.94 J
2.85 J

Energy Absorbed At 1100N 
 

6.40 J
5.95 J

Energy Absorbed At 1900N 
 

9.70 J
9.03 J
Show Text 

Forefoot Cushioning 
 

4.4
5.3

Forefoot Cushioning Picture  

Forefoot Cushioning  

See details
See details

Energy Absorbed At 800N 
 

3.05 J
3.60 J

Energy Absorbed At 1300N 
 

4.78 J
5.68 J

Energy Absorbed At 2050N 
 

6.60 J
7.94 J
Show Text 

Heel Firmness 
 

8.4
8.8

Heel Firmness  

See details
See details

Firmness At 550N 
 

73.5 N/mm
84.5 N/mm

Firmness At 1100N 
 

209.7 N/mm
231.0 N/mm

Firmness At 1900N 
 

513.5 N/mm
542.7 N/mm
Show Text 

Forefoot Firmness 
 

9.7
9.4

Forefoot Firmness  

See details
See details

Firmness At 800N 
 

194.5 N/mm
168.6 N/mm

Firmness At 1300N 
 

443.1 N/mm
360.2 N/mm

Firmness At 2050N 
 

873.5 N/mm
736.3 N/mm
Show Text 

Forefoot Long Run Cushioning 
 

3.4
5.1

Forefoot Long Run Cushioning  

See details
See details

Energy Absorbed At 10km 
 

3.86 J
5.57 J

Energy Absorbed At 20km 
 

3.78 J
5.48 J

Energy Absorbed At 30km 
 

3.72 J
5.43 J

Energy Absorbed At 40km 
 

3.68 J
5.38 J
Show Text 

adidas Adizero Adios 9

Nike Streakfly 2

Comments

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adidas Adizero Adios 9 vs Nike Streakfly 2: Main Discussion

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