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  1. Home
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Topo Specter 2 vs Specter 3

Which Running Shoe Is Better?

    Top
    Main Differences
    Design
      WeightStack HeightsExternal ShapeInternal ShapeForefoot Fit: WidthForefoot Fit: HeightArch Fit: WidthLength FitHeel Rocker GeometryForefoot Rocker GeometryFoamLacesBreathabilityTime-To-DryWater AbsorptionOther Features
    Performance
      Heel Compression Energy ReturnForefoot Compression Energy ReturnHeel CushioningForefoot CushioningHeel FirmnessForefoot FirmnessForefoot Long Run CushioningRocker StiffnessForefoot Bending Energy ReturnForefoot Bending StiffnessHeel Compression DepthForefoot Compression Depth
    Comments

Products

Topo Specter 2
Topo Specter 3 
early access

Tested using Methodology v0.8.2

Updated Jan 22, 2026 07:59 PM

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Amazon

Tested using Methodology v0.16

Updated Aug 24, 2026 03:36 PM

This review is in Early access

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RoadRunnerSports.com
Topo Specter 2 Picture

Track

Topo Specter 3 Picture

Track

Heel Stack Height
37.3 mm
Weight
231.0 g (8.15 oz)
Heel-To-Toe Drop
6.9 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

Topo Specter 2

Topo Specter 3

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

GIFT THIS COMPARISON

0 

Variants

  • Specter 2 (Blue/Blue - (Men - US 9))
  • Specter 2 (Blue/Blue - (Women - US 7))
  • Specter 3 (White/Sky - (Men - US 9))
  • Specter 3 (White/Teal - (Women - US 7))

Review

See Topo Specter 2 Review
See Topo Specter 3 Review
0 
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Main Differences for
Half/Full Marathon Racing

Threshold 

0.10

Half/Full Marathon Racing 
 

7.3
0.0

Plate 
 

None
Locked

Heel Stack Height 
 

37.3 mm
Lock mm

Full Comparison

Design

Weight  

7.1
N/A

Right Shoe Weight Photo  

Topo Specter 2 Right Shoe Weight Photo
Topo Specter 3 Right Shoe Weight Photo Sample

SAMPLE

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for pictures & test results

Left Shoe Weight Photo  

Topo Specter 2 Left Shoe Weight Photo
Topo Specter 3 Left Shoe Weight Photo Sample

SAMPLE

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for pictures & test results

Weight 
 

231.0 g (8.15 oz)
Lock g (Lock oz)

Stack Heights 
 

Stack Height Photo  

Topo Specter 2 Stack Height Photo
Topo Specter 3 Stack Height Photo Sample

SAMPLE

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for pictures & test results

Heel Stack Height 
 

37.3 mm
Lock mm

Forefoot Stack Height 
 

31.4 mm
Lock mm

Heel-To-Toe Drop 
 

6.9 mm
Lock mm

Advertised Heel-To-Toe Drop 
 

5.0 mm
Lock mm

External Shape 
 

3D Model Full Shoe  

Preview 3D
Topo Specter 2 3D Model Full Shoe
Topo Specter 3 3D Model Full Shoe Sample

SAMPLE

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for pictures & test results

Outsole Heel Width 
 

89 mm (3.5")
Lock mm (Lock")

Outsole Arch Width 
 

72 mm (2.8")
Lock mm (Lock")

Outsole Forefoot Width 
 

110 mm (4.3")
Lock mm (Lock")

Heel Width-To-Stack Ratio 
 

2.39
Lock

Forefoot Width-To-Stack Ratio 
 

3.50
Lock

Internal Shape 
 

3D Model Internal  

Preview 3D
Topo Specter 2 3D Model Internal
Topo Specter 3 3D Model Internal Sample

SAMPLE

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for pictures & test results

Internal Length 
 

276 mm (10.9")
Lock mm (Lock")

Internal Heel Width 
 

68 mm (2.7")
Lock mm (Lock")

Internal Forefoot Width 
 

98 mm (3.9")
Lock mm (Lock")

Wide Sizing Available 
 

No
Locked

Forefoot Fit: Width 
 

N/A

Forefoot Width Photo  

Topo Specter 3 Forefoot Width Photo Sample

SAMPLE

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for pictures & test results

Ball-Of-Foot TTS Deviation 
 

Lock mm (Lock")

Toe TTS Deviation 
 

Lock mm (Lock")

Forefoot Fit: Height 
 

N/A

Forefoot Height Photo  

Topo Specter 3 Forefoot Height Photo Sample

SAMPLE

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for pictures & test results

Toe TTS Deviation 
 

Lock mm (Lock")

Arch Fit: Width 
 

N/A

Arch Fit Photo  

Topo Specter 3 Arch Fit Photo Sample

SAMPLE

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for pictures & test results

Arch Width TTS Deviation 
 

Lock mm (Lock")

Length Fit 
 

N/A

Toe Clearance Photo  

Topo Specter 3 Toe Clearance Photo Sample

SAMPLE

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for pictures & test results

Heel Rocker Geometry 
 

N/A

Heel Rocker Photo  

Topo Specter 3 Heel Rocker Photo Sample

SAMPLE

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for pictures & test results

Heel Spring 
 

Lock mm (Lock")

Heel Apex Position 
 

Lock%

Heel Rocker Angle 
 

Lock°

Forefoot Rocker Geometry 
 

N/A

Forefoot Rocker Photo  

Topo Specter 3 Forefoot Rocker Photo Sample

SAMPLE

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for pictures & test results

Toe Spring 
 

Lock mm (Lock")

Toe Apex Position 
 

Lock%

Forefoot Rocker Angle 
 

Lock°

Foam 
 

Primary Foam Picture  

Topo Specter 3 Primary Foam Picture Sample

SAMPLE

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for pictures & test results

Secondary Foam Picture  

Topo Specter 3 Secondary Foam Picture Sample

SAMPLE

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for pictures & test results

Primary Foam Name 
 

Locked

Primary Foam Type 
 

Locked

Secondary Foam Name 
 

N/A

Secondary Foam Type 
 

N/A

Laces 
 

Laces Picture  

Topo Specter 3 Laces Picture Sample

SAMPLE

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for pictures & test results

Lace Type 
 

Locked

Width 
 

Lock mm (Lock")

Thickness 
 

Lock mm (Lock")

Stretch 
 

Lock%

Breathability 
 

N/A

Breathability Video  

Topo Specter 3 Breathability Video Sample

SAMPLE

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for videos & test results

Upper Breathability  

Topo Specter 3 Upper Breathability Sample

SAMPLE

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for pictures & test results

Upper Microscope Photo  

Topo Specter 3 Upper Microscope Photo Sample

SAMPLE

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for pictures & test results

Time-To-Dry 
 

N/A

Time-To-Dry Timelapse  

Topo Specter 3 Time-To-Dry Timelapse Sample

SAMPLE

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for videos & test results

Time-To-Dry Graph  

Topo Specter 3 Time-To-Dry Graph Sample

SAMPLE

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for pictures & test results

Time To 30% Dry 
 

Lock hrs

Time To 70% Dry 
 

Lock hrs

Time To Dry 
 

Lock hrs

Water Absorption 
 

N/A

Dry Weight Photo  

Topo Specter 3 Dry Weight Photo Sample

SAMPLE

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for pictures & test results

Wet Weight Photo  

Topo Specter 3 Wet Weight Photo Sample

SAMPLE

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for pictures & test results

Water Absorbed 
 

Lock%

Other Features  

Other Features Photo  

Topo Specter 2 Other Features Photo
Topo Specter 3 Other Features Photo Sample

SAMPLE

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for pictures & test results

Tongue Gusset Type 
 

Non-gusseted
Locked

Plate 
 

None
Locked
Performance

Heel Compression Energy Return 
 

6.8
N/A

Heel Compression Video  

Topo Specter 3 Heel Compression Video Sample

SAMPLE

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for videos & test results

Heel Energy Return  

 Preview Graph
Topo Specter 2 Heel Energy Return
Topo Specter 3 Heel Energy Return Sample

SAMPLE

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for pictures & test results

Heel Energy Return 
 

75.4%
Lock%

Forefoot Compression Energy Return 
 

7.5
N/A

Forefoot Compression Video  

Topo Specter 3 Forefoot Compression Video Sample

SAMPLE

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for videos & test results

Forefoot Energy Return  

 Preview Graph
Topo Specter 2 Forefoot Energy Return
Topo Specter 3 Forefoot Energy Return Sample

SAMPLE

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for pictures & test results

Forefoot Energy Return 
 

78.3%
Lock%

Heel Cushioning 
 

7.9
N/A

Heel Cushioning Picture  

Topo Specter 2 Heel Cushioning Picture
Topo Specter 3 Heel Cushioning Picture Sample

SAMPLE

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for pictures & test results

Heel Cushioning  

 Preview Graph
Topo Specter 2 Heel Cushioning
Topo Specter 3 Heel Cushioning Sample

SAMPLE

Join Now

for pictures & test results

Energy Absorbed At 550N 
 

3.64 J
Lock J

Energy Absorbed At 1100N 
 

9.49 J
Lock J

Energy Absorbed At 1900N 
 

16.29 J
Lock J

Forefoot Cushioning 
 

8.1
N/A

Forefoot Cushioning Picture  

Topo Specter 2 Forefoot Cushioning Picture
Topo Specter 3 Forefoot Cushioning Picture Sample

SAMPLE

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for pictures & test results

Forefoot Cushioning  

 Preview Graph
Topo Specter 2 Forefoot Cushioning
Topo Specter 3 Forefoot Cushioning Sample

SAMPLE

Join Now

for pictures & test results

Energy Absorbed At 800N 
 

4.62 J
Lock J

Energy Absorbed At 1300N 
 

8.81 J
Lock J

Energy Absorbed At 2050N 
 

13.27 J
Lock J

Heel Firmness 
 

5.5
N/A

Heel Firmness  

 Preview Graph
Topo Specter 2 Heel Firmness
Topo Specter 3 Heel Firmness Sample

SAMPLE

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for pictures & test results

Heel Firmness Graph  

Topo Specter 3 Heel Firmness Graph Sample

SAMPLE

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for pictures & test results

Firmness At 550N 
 

52.2 N/mm
Lock N/mm

Firmness At 1100N 
 

110.3 N/mm
Lock N/mm

Firmness At 1900N 
 

238.9 N/mm
Lock N/mm

Forefoot Firmness 
 

7.4
N/A

Forefoot Firmness  

 Preview Graph
Topo Specter 2 Forefoot Firmness
Topo Specter 3 Forefoot Firmness Sample

SAMPLE

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for pictures & test results

Forefoot Firmness Graph  

Topo Specter 3 Forefoot Firmness Graph Sample

SAMPLE

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for pictures & test results

Firmness At 800N 
 

91.0 N/mm
Lock N/mm

Firmness At 1300N 
 

176.7 N/mm
Lock N/mm

Firmness At 2050N 
 

389.3 N/mm
Lock N/mm

Forefoot Long Run Cushioning 
 

N/A

Forefoot Long Run Cushioning  

Topo Specter 3 Forefoot Long Run Cushioning Sample

SAMPLE

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for pictures & test results

Energy Absorbed At 10km 
 

Lock J

Energy Absorbed At 20km 
 

Lock J

Energy Absorbed At 30km 
 

Lock J

Energy Absorbed At 40km 
 

Lock J

Rocker Stiffness 
 

N/A

Forefoot Rocker Stiffness Video  

Topo Specter 3 Forefoot Rocker Stiffness Video Sample

SAMPLE

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for videos & test results

Forefoot Rocker Stiffness Graph  

Topo Specter 3 Forefoot Rocker Stiffness Graph Sample

SAMPLE

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for pictures & test results

Force To Flatten The Rocker 
 

Lock N

Forefoot Bending Energy Return 
 

N/A

Forefoot Bending Video  

Topo Specter 3 Forefoot Bending Video Sample

SAMPLE

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for videos & test results

Forefoot Bending Energy Return  

Topo Specter 3 Forefoot Bending Energy Return Sample

SAMPLE

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for pictures & test results

Forefoot Bending Energy Return 
 

Lock%

Forefoot Bending Stiffness 
 

N/A

Forefoot Bending Resistance Picture  

Topo Specter 3 Forefoot Bending Resistance Picture Sample

SAMPLE

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for pictures & test results

Forefoot Bending Resistance  

Topo Specter 3 Forefoot Bending Resistance Sample

SAMPLE

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for pictures & test results

Forefoot Bending Stiffness 
 

Lock N/mm

Forefoot Bending Force 
 

Lock N

Heel Compression Depth 
 

N/A

Heel Compression Graph  

Topo Specter 3 Heel Compression Graph Sample

SAMPLE

Join Now

for pictures & test results

Heel Compression At 550N 
 

Lock mm

Heel Compression At 1100N 
 

Lock mm

Heel Compression At 1900N 
 

Lock mm

Forefoot Compression Depth 
 

N/A

Forefoot Compression Graph  

Topo Specter 3 Forefoot Compression Graph Sample

SAMPLE

Join Now

for pictures & test results

Forefoot Compression At 800N 
 

Lock mm

Forefoot Compression At 1300N 
 

Lock mm

Forefoot Compression At 2050N 
 

Lock mm

Check Price

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Topo Specter 2

Topo Specter 3

Comments

  1. Comparison
 • Posted 1 hour ago

Topo Specter 2 vs Topo Specter 3: Main Discussion

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