Products
Tested using Methodology v1.0
Updated Oct 27, 2026 06:32 PM
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Tested using Methodology v0.16
Updated Oct 26, 2026 08:57 PM
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RoadRunnerSports.com
Heel Stack Height
44.6 mm
Weight
229.9 g (8.11 oz)
Heel-To-Toe Drop
8.7 mm
Plate
None
Heel Stack Height
38.8 mm
Weight
218.0 g (7.69 oz)
Heel-To-Toe Drop
8.4 mm
Plate
None
Our Verdict
ASICS MEGABLAST
Topo Specter 3
The ASICS MEGABLAST is a more complete all-rounder than the Topo Specter 3. It has deeper cushioning and better stability, and it's better suited to short-distance race paces. The Specter 3 is lighter and considerably more energetic, with a far roomier toe box, making it the pick if you want an exciting shoe for daily training, long runs, and marathon racing.
Variants
- MEGABLAST (Edo Purple/Black - (Men - US 9))
- MEGABLAST (Edo Purple/Black - (Women - US 7))
- Specter 3 (White/Sky - (Men - US 9))
- Specter 3 (White/Teal - (Women - US 7))
Main Differences for
Half/Full Marathon Racing
Half/Full Marathon Racing
Threshold
Half/Full Marathon Racing
8.1
8.0
Weight
7.2
7.6
Full Comparison
Design
Weight
7.2
7.6
Right Shoe Weight Photo
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Left Shoe Weight Photo
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Weight
229.9 g (8.11 oz)
218.0 g (7.69 oz)
Stack Heights
Stack Height Photo
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Heel Stack Height
44.6 mm
38.8 mm
Forefoot Stack Height
35.9 mm
30.4 mm
Heel-To-Toe Drop
8.7 mm
8.4 mm
Advertised Heel-To-Toe Drop
8.0 mm
5.0 mm
External Shape
3D Model Full Shoe
Preview 3D
Preview 3D
Outsole Heel Width
96 mm (3.8")
90 mm (3.5")
Outsole Arch Width
80 mm (3.2")
71 mm (2.8")
Outsole Forefoot Width
119 mm (4.7")
116 mm (4.6")
Heel Width-To-Stack Ratio
2.15
2.32
Forefoot Width-To-Stack Ratio
3.31
3.82
Internal Shape
3D Model Internal
Preview 3D
Preview 3D
Internal Length
282 mm (11.1")
278 mm (10.9")
Internal Heel Width
66 mm (2.6")
70 mm (2.8")
Internal Forefoot Width
94 mm (3.7")
98 mm (3.9")
Wide Sizing Available
No
No
Forefoot Fit: Width
7.9
7.7
Forefoot Width Photo
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Ball-Of-Foot TTS Deviation
-3.6 mm (-0.140")
5.5 mm (0.216")
Toe TTS Deviation
-2.9 mm (-0.115")
9.9 mm (0.391")
Forefoot Fit: Height
8.1
10
Forefoot Height Photo
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Toe TTS Deviation
-2.4 mm (-0.093")
1.6 mm (0.064")
Arch Fit: Width
8.0
9.9
Arch Fit Photo
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Arch Width TTS Deviation
-3.3 mm (-0.130")
1.6 mm (0.065")
Length Fit
10
10
Toe Clearance Photo
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Heel Rocker Geometry
8.4
8.3
Heel Rocker Photo
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Heel Spring
30 mm (1.2")
29 mm (1.1")
Heel Apex Position
21.7%
22.8%
Heel Rocker Angle
24.8°
23.7°
Forefoot Rocker Geometry
7.2
8.2
Forefoot Rocker Photo
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Toe Spring
50 mm (2.0")
60 mm (2.4")
Toe Apex Position
68.3%
58.6%
Forefoot Rocker Angle
27.8°
26.6°
Foam
Primary Foam Picture
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Secondary Foam Picture
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Primary Foam Name
FF TURBO²
RevFoam
Primary Foam Type
A-TPU
A-TPU
Secondary Foam Name
No Secondary Foam
No Secondary Foam
Secondary Foam Type
No Secondary Foam
No Secondary Foam
Laces
Laces Picture
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Lace Type
Sawtooth
Flat
Width
5.0 mm (0.2")
6.0 mm (0.2")
Thickness
1.2 mm (0.0")
2.2 mm (0.1")
Stretch
6.0%
6.5%
Breathability
7.5
7.5
Breathability Video
Upper Breathability
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Upper Microscope Photo
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Time-To-Dry
7.8
6.1
Time-To-Dry Timelapse
Time-To-Dry Graph
Preview Graph
Preview Graph
Time To 30% Dry
6.1 hrs
8.9 hrs
Time To 70% Dry
16.0 hrs
21.7 hrs
Time To Dry
24.2 hrs
29.6 hrs
Water Absorption
7.3
7.3
Dry Weight Photo
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Wet Weight Photo
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Water Absorbed
43.7%
43.3%
Other Features
Other Features Photo
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Tongue Gusset Type
Fully-gusseted
Non-gusseted
Plate
None
None
Performance
Heel Compression Energy Return
8.4
8.7
Heel Compression Video
Heel Energy Return
Preview Graph
Preview Graph
Heel Energy Return
82.9%
85.6%
Forefoot Compression Energy Return
8.3
9.0
Forefoot Compression Video
Forefoot Energy Return
Preview Graph
Preview Graph
Forefoot Energy Return
82.8%
88.3%
Heel Cushioning
9.3
8.7
Heel Cushioning Picture
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Heel Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 550N
4.35 J
4.47 J
Energy Absorbed At 1100N
12.12 J
10.63 J
Energy Absorbed At 1900N
21.19 J
16.85 J
Forefoot Cushioning
9.4
8.5
Forefoot Cushioning Picture
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Forefoot Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 800N
6.16 J
5.82 J
Energy Absorbed At 1300N
11.21 J
9.46 J
Energy Absorbed At 2050N
16.62 J
13.19 J
Heel Firmness
5.0
5.7
Heel Firmness Graph
Preview Graph
Preview Graph
Firmness At 550N
34.4 N/mm
33.3 N/mm
Firmness At 1100N
42.6 N/mm
45.1 N/mm
Firmness At 1900N
59.2 N/mm
66.2 N/mm
Forefoot Firmness
5.0
4.7
Forefoot Firmness Graph
Preview Graph
Preview Graph
Firmness At 800N
47.0 N/mm
43.0 N/mm
Firmness At 1300N
59.1 N/mm
58.5 N/mm
Firmness At 2050N
81 N/mm
84 N/mm
Forefoot Long Run Cushioning
8.9
8.2
Forefoot Long Run Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 10km
10.19 J
9.14 J
Energy Absorbed At 20km
9.98 J
8.94 J
Energy Absorbed At 30km
9.84 J
8.82 J
Energy Absorbed At 40km
9.74 J
8.73 J
Rocker Stiffness
7.5
4.7
Forefoot Rocker Stiffness Video
Forefoot Rocker Stiffness Graph
Preview Graph
Preview Graph
Force To Flatten The Rocker
99 N
39 N
Forefoot Bending Energy Return
7.9
8.5
Forefoot Bending Video
Forefoot Bending Energy Return
Preview Graph
Preview Graph
Forefoot Bending Energy Return
70.9%
75.9%
Forefoot Bending Stiffness
7.8
6.3
Forefoot Bending Resistance Picture
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Forefoot Bending Resistance
Preview Graph
Preview Graph
Forefoot Bending Stiffness
16.1 N/mm
12.3 N/mm
Forefoot Bending Force
316 N
215 N
Forefoot Compression Depth
7.4
7.6
Forefoot Compression Graph
Preview Graph
Preview Graph
Forefoot Compression At 800N
17.0 mm
18.6 mm
Forefoot Compression At 1300N
22.0 mm
22.2 mm
Forefoot Compression At 2050N
25.3 mm
24.5 mm
Heel Compression Depth
7.6
7.3
Heel Compression Graph
Preview Graph
Preview Graph
Heel Compression At 550N
16.0 mm
16.5 mm
Heel Compression At 1100N
25.8 mm
24.4 mm
Heel Compression At 1900N
32.1 mm
28.7 mm
Dry Concrete Grip
9.1
Dry Concrete Forefoot Video
Dry Concrete Forefoot Graph
Preview Graph
Sliding Force
276.1 N (62.1 lbf)
Coefficient Of Friction
1.07
Wet Concrete Grip
9.1
Wet Concrete Forefoot Video
Wet Concrete Forefoot Graph
Preview Graph
Sliding Force
274.1 N (61.6 lbf)
Coefficient Of Friction
1.07
Wet Aluminum Grip
6.9
Wet Aluminum Forefoot Video
Wet Aluminum Forefoot Graph
Preview Graph
Sliding Force
122.1 N (27.4 lbf)
Coefficient Of Friction
0.74
Gravel Grip
3.2
Gravel Forefoot Video
Gravel Forefoot Graph
Preview Graph
Sliding Force
53.0 N (11.9 lbf)
Coefficient Of Friction
0.32
Mud Grip
5.1
Mud Forefoot Video
Mud Forefoot Graph
Preview Graph
Sliding Force
87.3 N (19.6 lbf)
Coefficient Of Friction
0.53
Exposed Foam
7.0
Outsole Photo
Heel Exposed Foam
6.0
Forefoot Exposed Foam
8.0
Outsole Abrasion Wear
8.0
Outsole Durability Video
Outsole Durability Photo
Heel Abrasion Wear
8.0
Forefoot Abrasion Wear
8.0
ASICS MEGABLAST
Topo Specter 3
Comments
ASICS MEGABLAST vs Topo Specter 3: Main Discussion
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