Topo Specter 3 vs ASICS MEGABLAST: Which Running Shoe Is Better?

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Tested using Methodology v0.16

Updated Aug 17, 2026 07:57 PM

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Amazon

Tested using Methodology v0.16

Updated Aug 24, 2026 03:36 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

Recommended in 6 articles:
Running Shoes
For Men
Women
3

Our Verdict

ASICS MEGABLAST

Topo Specter 3

Full comparison details regarding individual product score sets can be found in the section below

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))

Review

See ASICS MEGABLAST Review

See Topo Specter 3 Review

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Main Differences for

Half/Full Marathon Racing

Threshold

0.10

Half/Full Marathon Racing

8.1

0.0

No major differences between these running shoes for half/full marathon racing. See full list of tests below.

Full Comparison

Half/Full Marathon Racing

8.1

0.0

5K/10K Racing

7.0

0.0

Long Run

8.0

0.0

Daily Training

8.1

0.0

Energy Return

8.3

0.0

Stability

6.7

0.0

Cushioning

9.3

0.0

Bounciness

7.8

0.0

Snappiness

7.1

0.0

Roll

7.6

0.0

True To Size

8.9

0.0

Design

Weight

7.2

N/A

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Weight

229.9 g (8.11 oz)

Lock g (Lock oz)

Stack Heights

Stack Height Photo

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Heel Stack Height

44.6 mm

Lock mm

Forefoot Stack Height

35.9 mm

Lock mm

Heel-To-Toe Drop

8.7 mm

Lock mm

Advertised Heel-To-Toe Drop

8.0 mm

Lock mm

External Shape

3D Model Full Shoe

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Outsole Heel Width

96 mm (3.8")

Lock mm (Lock")

Outsole Arch Width

80 mm (3.2")

Lock mm (Lock")

Outsole Forefoot Width

119 mm (4.7")

Lock mm (Lock")

Heel Width-To-Stack Ratio

2.15

Lock

Forefoot Width-To-Stack Ratio

3.31

Lock

Internal Shape

3D Model Internal

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Internal Length

282 mm (11.1")

Lock mm (Lock")

Internal Heel Width

66 mm (2.6")

Lock mm (Lock")

Internal Forefoot Width

94 mm (3.7")

Lock mm (Lock")

Wide Sizing Available

Locked

Forefoot Fit: Width

7.9

N/A

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Ball-Of-Foot TTS Deviation

-3.6 mm (-0.140")

Lock mm (Lock")

Toe TTS Deviation

-2.9 mm (-0.115")

Lock mm (Lock")

Forefoot Fit: Height

8.1

N/A

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Toe TTS Deviation

-2.4 mm (-0.093")

Lock mm (Lock")

Arch Fit: Width

8.0

N/A

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Arch Width TTS Deviation

-3.3 mm (-0.130")

Lock mm (Lock")

Length Fit

N/A

Toe Clearance Photo

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Heel Rocker Geometry

8.4

N/A

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Heel Spring

30 mm (1.2")

Lock mm (Lock")

Heel Apex Position

21.7%

Lock%

Heel Rocker Angle

24.8°

Lock°

Forefoot Rocker Geometry

7.2

N/A

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Toe Spring

50 mm (2.0")

Lock mm (Lock")

Toe Apex Position

68.3%

Lock%

Forefoot Rocker Angle

27.8°

Lock°

Foam

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Primary Foam Name

FF TURBO2

Locked

Primary Foam Type

A-TPU

Locked

Secondary Foam Name

N/A

Secondary Foam Type

N/A

Laces

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Lace Type

Sawtooth

Locked

Width

5.0 mm (0.2")

Lock mm (Lock")

Thickness

1.2 mm (0.0")

Lock mm (Lock")

Stretch

6.0%

Lock%

Breathability

7.5

N/A

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Upper Breathability

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Upper Microscope Photo

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Time-To-Dry

6.9

N/A

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Time-To-Dry Graph

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Time To 30% Dry

6.1 hrs

Lock hrs

Time To 70% Dry

16.0 hrs

Lock hrs

Time To Dry

30.2 hrs

Lock hrs

Water Absorption

7.3

N/A

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Water Absorbed

43.7%

Lock%

Other Features

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Tongue Gusset Type

Fully-gusseted

Locked

Plate

None

Locked

Performance

Heel Compression Energy Return

8.4

N/A

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Heel Energy Return

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Heel Energy Return

82.9%

Lock%

Forefoot Compression Energy Return

8.3

N/A

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Forefoot Energy Return

Preview Graph

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Forefoot Energy Return

82.8%

Lock%

Heel Cushioning

9.3

N/A

Heel Cushioning Picture

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Heel Cushioning

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Energy Absorbed At 550N

4.35 J

Lock J

Energy Absorbed At 1100N

12.12 J

Lock J

Energy Absorbed At 1900N

21.19 J

Lock J

Forefoot Cushioning

9.4

N/A

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Forefoot Cushioning

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Energy Absorbed At 800N

6.16 J

Lock J

Energy Absorbed At 1300N

11.21 J

Lock J

Energy Absorbed At 2050N

16.62 J

Lock J

Heel Firmness

5.0

N/A

Heel Firmness Graph

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Firmness At 550N

34.4 N/mm

Lock N/mm

Firmness At 1100N

42.6 N/mm

Lock N/mm

Firmness At 1900N

59.2 N/mm

Lock N/mm

Forefoot Firmness

5.0

N/A

Forefoot Firmness Graph

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Firmness At 800N

47.0 N/mm

Lock N/mm

Firmness At 1300N

59.1 N/mm

Lock N/mm

Firmness At 2050N

81 N/mm

Lock N/mm

Forefoot Long Run Cushioning

8.9

N/A

Forefoot Long Run Cushioning

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Energy Absorbed At 10km

10.19 J

Lock J

Energy Absorbed At 20km

9.98 J

Lock J

Energy Absorbed At 30km

9.84 J

Lock J

Energy Absorbed At 40km

9.74 J

Lock J

Rocker Stiffness

7.5

N/A

Forefoot Rocker Stiffness Video

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Forefoot Rocker Stiffness Graph

Preview Graph

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Force To Flatten The Rocker

99 N

Lock N

Forefoot Bending Energy Return

7.9

N/A

Forefoot Bending Video

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Forefoot Bending Energy Return

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Forefoot Bending Energy Return

70.9%

Lock%

Forefoot Bending Stiffness

7.8

N/A

Forefoot Bending Resistance Picture

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Forefoot Bending Resistance

Preview Graph

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Forefoot Bending Stiffness

16.1 N/mm

Lock N/mm

Forefoot Bending Force

316 N

Lock N

Heel Compression Depth

7.6

N/A

Heel Compression Graph

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Heel Compression At 550N

16.0 mm

Lock mm

Heel Compression At 1100N

25.8 mm

Lock mm

Heel Compression At 1900N

32.1 mm

Lock mm

Forefoot Compression Depth

7.4

N/A

Forefoot Compression Graph

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Forefoot Compression At 800N

17.0 mm

Lock mm

Forefoot Compression At 1300N

22.0 mm

Lock mm

Forefoot Compression At 2050N

25.3 mm

Lock mm

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ASICS MEGABLAST

Topo Specter 3

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Comparison

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ASICS MEGABLAST vs Topo Specter 3: Main Discussion

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ASICS MEGABLAST vs Topo Specter 3

Which Running Shoe Is Better?

Products

Our Verdict

Variants

Review

Check Price

Main Differences for Half/Full Marathon Racing

Threshold

Half/Full Marathon Racing

Full Comparison

Half/Full Marathon Racing

5K/10K Racing

Long Run

Daily Training

Energy Return

Stability

Cushioning

Bounciness

Snappiness

Roll

True To Size

Weight

Right Shoe Weight Photo

Left Shoe Weight Photo

Weight

Stack Heights

Stack Height Photo

Heel Stack Height

Forefoot Stack Height

Heel-To-Toe Drop

Advertised Heel-To-Toe Drop

External Shape

3D Model Full Shoe

Outsole Heel Width

Outsole Arch Width

Outsole Forefoot Width

Heel Width-To-Stack Ratio

Forefoot Width-To-Stack Ratio

Internal Shape

3D Model Internal

Internal Length

Internal Heel Width

Internal Forefoot Width

Wide Sizing Available

Forefoot Fit: Width

Forefoot Width Photo

Ball-Of-Foot TTS Deviation

Toe TTS Deviation

Forefoot Fit: Height

Forefoot Height Photo

Toe TTS Deviation

Arch Fit: Width

Arch Fit Photo

Arch Width TTS Deviation

Length Fit

Toe Clearance Photo

Heel Rocker Geometry

Heel Rocker Photo

Heel Spring

Heel Apex Position

Heel Rocker Angle

Forefoot Rocker Geometry

Forefoot Rocker Photo

Toe Spring

Toe Apex Position

Forefoot Rocker Angle

Foam

Primary Foam Picture

Secondary Foam Picture

Primary Foam Name

Primary Foam Type

Secondary Foam Name

Secondary Foam Type

Laces

Laces Picture

Lace Type

Width

Thickness

Stretch

Main Differences for

Half/Full Marathon Racing