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Updated Sep 01, 2026 03:14 PM
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Asics.com
Heel Stack Height
31.3 mm
Weight
214.7 g (7.57 oz)
Heel-To-Toe Drop
7.3 mm
Plate
None
Heel Stack Height
42.2 mm
Weight
308.4 g (10.88 oz)
Heel-To-Toe Drop
10.9 mm
Plate
None
Our Verdict
New Balance FuelCell Rebel v4
ASICS GEL-KAYANO 31
For most runners, the New Balance FuelCell Rebel v4 has some advantages over the ASICS GEL-KAYANO 31. It's a significantly lighter shoe that offers some ground feel thanks to its much lower stack height compared to the GEL-KAYANO. Thanks to its more responsive foam, the New Balance is a bit more efficient and better at picking up the pace. The GEL-KAYANO is still a better fit for runners who prefer higher stacks or need a stability shoe.
Variants
- FuelCell Rebel v4 (Black/Graphite - (Men - US 9))
- FuelCell Rebel v4 (Black/Graphite/White - (Women - US 7))
- GEL-KAYANO 31 (Birch/Energy Aqua - (Women - US 7))
- GEL-KAYANO 31 (Black/Black - (Men - US 9))
Main Differences for
Half/Full Marathon Racing
Half/Full Marathon Racing
Threshold
Half/Full Marathon Racing
5.6
5.8
Weight
7.7
4.0
Heel Stack Height
31.3 mm
42.2 mm
Forefoot Stack Height
24.0 mm
31.3 mm
Forefoot Compression Energy Return
6.0
1.3
Forefoot Bending Stiffness
4.4
7.2
Forefoot Long Run Cushioning
5.0
6.1
Full Comparison
Design
Weight
7.7
4.0
Right Shoe Weight Photo
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Left Shoe Weight Photo
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Weight
214.7 g (7.57 oz)
308.4 g (10.88 oz)
Stack Heights
Stack Height Photo
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Heel Stack Height
31.3 mm
42.2 mm
Forefoot Stack Height
24.0 mm
31.3 mm
Heel-To-Toe Drop
7.3 mm
10.9 mm
Advertised Heel-To-Toe Drop
6.0 mm
10.0 mm
External Shape
3D Model Full Shoe
Preview 3D
Preview 3D
Outsole Heel Width
95 mm (3.7")
95 mm (3.7")
Outsole Arch Width
77 mm (3.0")
84 mm (3.3")
Outsole Forefoot Width
116 mm (4.6")
117 mm (4.6")
Heel Width-To-Stack Ratio
3.04
2.25
Forefoot Width-To-Stack Ratio
4.83
3.73
Internal Shape
3D Model Internal
Preview 3D
Preview 3D
Internal Length
274 mm (10.8")
279 mm (11.0")
Internal Heel Width
64 mm (2.5")
66 mm (2.6")
Internal Forefoot Width
95 mm (3.7")
96 mm (3.8")
Wide Sizing Available
Yes
Yes
Forefoot Fit: Width
7.8
8.8
Forefoot Width Photo
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Ball-Of-Foot TTS Deviation
7.4 mm (0.293")
4.5 mm (0.178")
Toe TTS Deviation
2.5 mm (0.099")
3.2 mm (0.126")
Forefoot Fit: Height
7.1
7.9
Forefoot Height Photo
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Toe TTS Deviation
-3.5 mm (-0.138")
-2.6 mm (-0.101")
Arch Fit: Width
6.0
9.9
Arch Fit Photo
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Arch Width TTS Deviation
-5.8 mm (-0.226")
1.1 mm (0.042")
Length Fit
7.0
10
Toe Clearance Photo
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Heel Rocker Geometry
8.7
6.7
Heel Rocker Photo
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Heel Spring
35 mm (1.4")
17 mm (0.7")
Heel Apex Position
25.9%
15.3%
Heel Rocker Angle
25.6°
20.7°
Forefoot Rocker Geometry
7.5
6.8
Forefoot Rocker Photo
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Toe Spring
51 mm (2.0")
47 mm (1.9")
Toe Apex Position
57.4%
66.1%
Forefoot Rocker Angle
23.0°
25.2°
Foam
Primary Foam Picture
Secondary Foam Picture
Primary Foam Name
FF BLAST+ ECO
Primary Foam Type
Unknown
Secondary Foam Name
No Secondary Foam
Secondary Foam Type
No Secondary Foam
Other Features
Other Features Photo
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Tongue Gusset Type
Semi-gusseted
Fully-gusseted
Plate
None
None
Performance
Heel Compression Energy Return
5.5
1.6
Heel Compression Video
Heel Energy Return
Preview Graph
Preview Graph
Heel Energy Return
72.6%
66.8%
Forefoot Compression Energy Return
6.0
1.3
Forefoot Compression Video
Forefoot Energy Return
Preview Graph
Preview Graph
Forefoot Energy Return
73.4%
65.7%
Heel Cushioning
6.1
7.6
Heel Cushioning Picture
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Heel Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 550N
3.17 J
3.20 J
Energy Absorbed At 1100N
7.75 J
9.25 J
Energy Absorbed At 1900N
12.55 J
16.85 J
Forefoot Cushioning
5.7
6.6
Forefoot Cushioning Picture
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Forefoot Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 800N
3.71 J
3.74 J
Energy Absorbed At 1300N
6.10 J
7.11 J
Energy Absorbed At 2050N
8.64 J
11.05 J
Heel Firmness
8.6
8.5
Heel Firmness Graph
Preview Graph
Preview Graph
Firmness At 550N
45.9 N/mm
49.7 N/mm
Firmness At 1100N
61.7 N/mm
58.9 N/mm
Firmness At 1900N
89.8 N/mm
79.4 N/mm
Forefoot Firmness
9.4
9.5
Forefoot Firmness Graph
Preview Graph
Preview Graph
Firmness At 800N
73.6 N/mm
80.3 N/mm
Firmness At 1300N
98.3 N/mm
98.1 N/mm
Firmness At 2050N
139 N/mm
131 N/mm
Forefoot Long Run Cushioning
5.0
6.1
Forefoot Long Run Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 10km
5.49 J
6.67 J
Energy Absorbed At 20km
5.34 J
6.52 J
Energy Absorbed At 30km
5.24 J
6.44 J
Energy Absorbed At 40km
5.16 J
6.39 J
Rocker Stiffness
6.5
6.1
Forefoot Rocker Stiffness Video
Forefoot Rocker Stiffness Graph
Preview Graph
Preview Graph
Force To Flatten The Rocker
72 N
63 N
Forefoot Bending Energy Return
4.4
3.7
Forefoot Bending Video
Forefoot Bending Energy Return
Preview Graph
Preview Graph
Forefoot Bending Energy Return
54.8%
52.3%
Forefoot Bending Stiffness
4.4
7.2
Forefoot Bending Resistance Picture
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Forefoot Bending Resistance
Preview Graph
Preview Graph
Forefoot Bending Stiffness
4.4 N/mm
10.5 N/mm
Forefoot Bending Force
191 N
348 N
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New Balance FuelCell Rebel v4
ASICS GEL-KAYANO 31
Comments
New Balance FuelCell Rebel v4 vs ASICS GEL-KAYANO 31: Main Discussion
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