ShoeGeometry

ASICS Magic Speed 5 vs ASICS Magic Speed 4

What changed from the ASICS Magic Speed 4: stack lower, stiffness more flexible, weight lighter. Each cell carries a provenance badge; open a shoe for sources.

heel boneASICS Magic Speed 5: heel 36 mm, forefoot 29 mm (drop 7 mm); toe rocker 33 % of length, radius 37 % of length; heel bevel 9 % of length, 25 mm high at the back, ending behind the heel bone (only the back edge is rounded).ASICS Magic Speed 5: toe rocker 33 % of lengthASICS Magic Speed 4: heel 44 mm, forefoot 36 mm (drop 8 mm); toe rocker 33 % of length, radius 37 % of length; heel bevel 9 % of length, 21 mm high at the back, ending behind the heel bone (only the back edge is rounded).ASICS Magic Speed 4: toe rocker 33 % of length
  • ASICS Magic Speed 536/29 mm · toe rocker 33 % · heel bevel 9 %
  • ASICS Magic Speed 444/36 mm · toe rocker 33 % · heel bevel 9 %
Illustrative profiles, not photographs: drawn from published stack heights and photo estimates of the unloaded shoes on a common length (300 mm), heels aligned, toe to the left; dots mark where each toe rocker starts; the dotted vertical line is under the heel bone (12 % of length), so a heel curve reaching past it is a bevel in front of the heel bone. Dotted lines use typical values where a shoe has no measurement. Exact values are in the table below.

What changed

MeasureASICS Magic Speed 4ASICS Magic Speed 5Change
Heel stack43.5 mm36 mmlower (−7.5 mm)
Forefoot stack35.5 mm29 mmlower (−6.5 mm)
Drop8 mm7 mmless (−1 mm)
Weight241 g196 glighter (−45 g)
Toe rocker33.4% of length33% of lengthabout the same
Toe tip over ground44 mm44.4 mmabout the same
Rocker rise angle33.4°31.9°about the same
Stiffness98/10027/100more flexible (−71)
Firmness43/10025/100softer (−18)
Forefoot base width109.6 mm110.1 mmabout the same
PlateCarbon compositeCarbon platenaming difference: a carbon plate in both; sources describe it differently (full carbon vs carbon-infused)
FoamFF Blast+ with FF Turbo forefoot insertFF Leap top / FF Blast Plus bottomunclear: named differently; the sources do not say whether the material changed

Compared with the previous version in this catalogue. Differences within measurement noise are shown as about the same. All version changes

MetricASICS Magic Speed 5
Tempo · Road
ASICS Magic Speed 4
Tempo · Road
Heel-to-toe drop7 mmStated8 mmStated
Heel stack36 mmStated43.5 mmStated
Forefoot stack29 mmStated35.5 mmStated
Weight196 gStated241 gStated
Toe rocker33 %est.33 %est.
Rocker radius37 %est.37 %est.
Rocker rise angle32 degest.33 degest.
Rocker angle at toe61 degest.63 degest.
Toe tip over ground44 mmest.44 mm*est.
Visible rocker lift onset77.9 %est.75.6 %est.
Toe spring (relative)20.3 %est.22.7 %est.
Heel bevel length9.1 %est.8.6 %est.
Heel bevel height25 mmest.21 mm*est.
Midsole width (forefoot)110.1 mmMeasured109.6 mmMeasured
Midsole width (heel)78.1 mmMeasured87.4 mmMeasured
Toe box shape—74 %*est.
Interior forefoot width95.1 mmMeasured93.6 mmMeasured
Toebox width71.9 mmMeasured74.3 mmMeasured
Longitudinal stiffness27Derived98Derived
Midsole firmness25Derived43Derived
PlateCarbon plateCarbon composite
Primary foamFF Leap top / FF Blast Plus bottomFF Blast+ with FF Turbo forefoot insert
List price$180$170

Key differences

  • ASICS Magic Speed 5's heel-to-toe drop is 7 mm, 1 mm lower than ASICS Magic Speed 4's 8 mm.
  • ASICS Magic Speed 5's heel stack is 36 mm, 7.5 mm thinner than ASICS Magic Speed 4's 43.5 mm.
  • ASICS Magic Speed 5's forefoot stack is 29 mm, 6.5 mm thinner than ASICS Magic Speed 4's 35.5 mm.
  • ASICS Magic Speed 5's weight is 196 g, 45 g lighter than ASICS Magic Speed 4's 241 g.
  • Toe rocker is about the same: 33 % of length for ASICS Magic Speed 5, 33 % of length for ASICS Magic Speed 4.

ASICS Magic Speed 5 details · ASICS Magic Speed 4 details · Add more shoes