Mizuno Neo Zen vs R.A.D UFO

Which Running Shoe Is Better?

Products

Mizuno Neo Zen
R.A.D UFO

Tested using Methodology v0.10

Updated Mar 10, 2026 03:31 PM

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Amazon.com

Tested using Methodology v0.10

Updated Mar 16, 2026 07:53 PM

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R.A.D
Mizuno Neo Zen Picture

Track

R.A.D UFO Picture

Track

  1. Recommended in 2 articles:
  2. Marathon
  3. Long Distance

Our Verdict

Mizuno Neo Zen

R.A.D UFO

The R.A.D UFO and Mizuno Neo Zen are two high-stack trainers with lively foams, but they approach that energetic feel differently. The R.A.D UFO leans more toward cushioning and bounce, delivering a softer, more bouncy ride that feels especially plush underfoot. The Mizuno Neo Zen is the lighter option, offering a more agile feel, though it doesn't feel quite as deeply cushioned. Also, the Mizuno features a lower drop, resulting in a more effective stack in the forefoot. The uppers also contrast strongly: the R.A.D uses a more substantial construction with generous padding and a gusseted tongue that adds structure and comfort, while the Mizuno opts for a minimal mesh, sock-like upper that feels more minimal.

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Variants

  • Neo Zen (Black/Raspberry - (Men - US 9))
  • Neo Zen (Black/White - (Women - US 7))
  • UFO (Highlighter Pink - (Men - US 9))
  • UFO (Racing Blue - (Women - US 7))

Main Differences for
Marathon Racing

Threshold 

0.10

Marathon Racing 
 

7.6
7.7

Forefoot Energy Return 
 

7.1
8.4

Weight  

7.3
6.5

Full Comparison

Design

Weight  

7.3
6.5

Right Shoe Weight Photo 
 

Compare High-Res
Mizuno Neo Zen Right Shoe Weight Photo
Compare High-Res
R.A.D UFO Right Shoe Weight Photo

Left Shoe Weight Photo 
 

Compare High-Res
Mizuno Neo Zen Left Shoe Weight Photo
Compare High-Res
R.A.D UFO Left Shoe Weight Photo

Weight 
 

226.3 g (7.98 oz)
247.4 g (8.73 oz)
Show Text 

Stack Heights 
 

Stack Height Photo 
 

Compare High-Res
Mizuno Neo Zen Stack Height Photo
Compare High-Res
R.A.D UFO Stack Height Photo

Heel Stack Height 
 

41.1 mm
43.4 mm

Forefoot Stack Height 
 

36.2 mm
35.3 mm

Heel-To-Toe Drop 
 

4.9 mm
8.1 mm

Advertised Heel-To-Toe Drop 
 

6.0 mm
8.0 mm

External Shape 
 

3D Model Full Shoe  

Preview 3D
Mizuno Neo Zen 3D Model Full Shoe
Preview 3D
R.A.D UFO 3D Model Full Shoe

Outsole Heel Width 
 

92 mm (3.6")
100 mm (3.9")

Outsole Arch Width 
 

79 mm (3.1")
81 mm (3.2")

Outsole Forefoot Width 
 

111 mm (4.4")
119 mm (4.7")

Heel Width-To-Stack Ratio 
 

2.24
2.30

Forefoot Width-To-Stack Ratio 
 

3.07
3.37

Internal Shape 
 

3D Model Internal  

Preview 3D
Mizuno Neo Zen 3D Model Internal
Preview 3D
R.A.D UFO 3D Model Internal

Internal Length 
 

275 mm (10.8")
279 mm (11.0")

Internal Heel Width 
 

62 mm (2.4")
65 mm (2.6")

Internal Forefoot Width 
 

93 mm (3.7")
91 mm (3.6")

Wide Sizing Available 
 

No
No

Forefoot Fit: Width 
 

9.9
8.6

Forefoot Width Photo 
 

Compare High-Res
Mizuno Neo Zen Forefoot Width Photo
Compare High-Res
R.A.D UFO Forefoot Width Photo

Ball-Of-Foot TTS Deviation 
 

-0.5 mm (-0.020")
0.1 mm (0.004")

Toe TTS Deviation 
 

0.7 mm (0.026")
-5.3 mm (-0.209")

Forefoot Fit: Height 
 

7.7
2.7

Forefoot Height Photo 
 

Compare High-Res
Mizuno Neo Zen Forefoot Height Photo
Compare High-Res
R.A.D UFO Forefoot Height Photo

Toe TTS Deviation 
 

-2.7 mm (-0.107")
-8.5 mm (-0.335")

Arch Fit: Width 
 

7.4
9.8

Arch Fit Photo 
 

Compare High-Res
Mizuno Neo Zen Arch Fit Photo
Compare High-Res
R.A.D UFO Arch Fit Photo

Arch Width TTS Deviation 
 

-4.1 mm (-0.161")
2.5 mm (0.098")

Length Fit 
 

10
10

Toe Clearance Photo 
 

Compare High-Res
Mizuno Neo Zen Toe Clearance Photo
Compare High-Res
R.A.D UFO Toe Clearance Photo
Show Text 

Other Features  

Other Features Photo 
 

Compare High-Res
Mizuno Neo Zen Other Features Photo
Compare High-Res
R.A.D UFO Other Features Photo

Tongue Gusset Type 
 

Non-gusseted
Fully-gusseted

Plate 
 

None
None
Performance

Heel Energy Return 
 

7.3
8.1

Heel Compression Video  

Heel Energy Return  

 Preview Graph
Mizuno Neo Zen Heel Energy Return
 Preview Graph
R.A.D UFO Heel Energy Return

Heel Energy Return 
 

77.4%
81.4%
Show Text 

Forefoot Energy Return 
 

7.1
8.4

Forefoot Compression Video  

Forefoot Energy Return  

 Preview Graph
Mizuno Neo Zen Forefoot Energy Return
 Preview Graph
R.A.D UFO Forefoot Energy Return

Forefoot Energy Return 
 

76.5%
83.1%
Show Text 

Heel Cushioning 
 

8.3
8.6

Heel Cushioning Picture 
 

Compare High-Res
Mizuno Neo Zen Heel Cushioning Picture
Compare High-Res
R.A.D UFO Heel Cushioning Picture

Heel Cushioning  

 Preview Graph
Mizuno Neo Zen Heel Cushioning
 Preview Graph
R.A.D UFO Heel Cushioning

Energy Absorbed At 550N 
 

4.24 J
4.19 J

Energy Absorbed At 1100N 
 

10.05 J
10.28 J

Energy Absorbed At 1900N 
 

16.18 J
17.45 J
Show Text 

Forefoot Cushioning 
 

8.4
8.5

Forefoot Cushioning Picture 
 

Compare High-Res
Mizuno Neo Zen Forefoot Cushioning Picture
Compare High-Res
R.A.D UFO Forefoot Cushioning Picture

Forefoot Cushioning  

 Preview Graph
Mizuno Neo Zen Forefoot Cushioning
 Preview Graph
R.A.D UFO Forefoot Cushioning

Energy Absorbed At 800N 
 

5.48 J
5.53 J

Energy Absorbed At 1300N 
 

9.10 J
9.27 J

Energy Absorbed At 2050N 
 

12.99 J
13.32 J
Show Text 

Heel Firmness 
 

5.6
5.0

Heel Firmness  

 Preview Graph
Mizuno Neo Zen Heel Firmness
 Preview Graph
R.A.D UFO Heel Firmness

Firmness At 550N 
 

47.9 N/mm
47.8 N/mm

Firmness At 1100N 
 

117.4 N/mm
106.0 N/mm

Firmness At 1900N 
 

268.4 N/mm
221.1 N/mm
Show Text 

Forefoot Firmness 
 

7.9
7.8

Forefoot Firmness  

 Preview Graph
Mizuno Neo Zen Forefoot Firmness
 Preview Graph
R.A.D UFO Forefoot Firmness

Firmness At 800N 
 

98.0 N/mm
95.9 N/mm

Firmness At 1300N 
 

206.9 N/mm
199.4 N/mm

Firmness At 2050N 
 

435.7 N/mm
410.2 N/mm
Show Text 

Forefoot Long Run Cushioning 
 

8.0
8.2

Forefoot Long Run Cushioning  

 Preview Graph
Mizuno Neo Zen Forefoot Long Run Cushioning
 Preview Graph
R.A.D UFO Forefoot Long Run Cushioning

Energy Absorbed At 10km 
 

8.88 J
8.97 J

Energy Absorbed At 20km 
 

8.72 J
8.84 J

Energy Absorbed At 30km 
 

8.63 J
8.75 J

Energy Absorbed At 40km 
 

8.53 J
8.69 J

Mizuno Neo Zen

R.A.D UFO

Comments

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