ShoeGeometry

Nike Alphafly 4 vs Saucony Endorphin Pro 5

Two current shoes in the same category with similar stack height and drop, compared on the values in the database. Each cell carries a provenance badge; open a shoe for sources.

Nike Alphafly 4: heel 39 mm, forefoot 31 mm (drop 8 mm); rocker apex 64 % of length, radius 43 % of length.Nike Alphafly 4: rocker apex at 64 % of lengthSaucony Endorphin Pro 5: heel 40 mm, forefoot 32 mm (drop 8 mm); rocker apex 63 % of length, radius 40 % of length.Saucony Endorphin Pro 5: rocker apex at 63 % of length
  • Nike Alphafly 439/31 mm · apex 64 %
  • Saucony Endorphin Pro 540/32 mm · apex 63 %
Midsoles drawn from measured values on a common length (290 mm), heels aligned, toe to the left; dots mark the rocker apex. Dotted lines use typical values where a shoe has no measurement. Exact values are in the table below.
MetricNike Alphafly 4
Racing · Road
Saucony Endorphin Pro 5
Racing · Road
Heel-to-toe drop8 mmStated8 mmStated
Heel stack39 mmStated40 mmStated
Forefoot stack31 mmStated32 mmStated
Weight188 gStated232 gStated
Rocker apex64.5 %est.63.4 %est.
Rocker radius43 %est.40 %est.
Rocker rise angle25 degest.32 degest.
Toe tip over ground41 mmest.47 mmest.
Rocker angle at toe44 degest.62 degest.
Visible rocker lift onset76.7 %est.76.2 %est.
Toe spring (relative)16.4 %est.21.4 %est.
Midsole width (forefoot)—120.1 mmMeasured
Midsole width (heel)—91.2 mmMeasured
Interior forefoot width—95.2 mmMeasured
Toebox width—69.3 mmMeasured
Longitudinal stiffness—96Derived
Midsole firmness—49Derived
PlateCarbon plateCarbon plate
Primary foamZoomX + Air Zoom unitsPWRRUN HG + PWRRUN PB
List price$280$240

Key differences

  • Heel-to-toe drop is about the same: 8 mm for Nike Alphafly 4, 8 mm for Saucony Endorphin Pro 5.
  • Nike Alphafly 4's heel stack is 39 mm, 1 mm thinner than Saucony Endorphin Pro 5's 40 mm.
  • Nike Alphafly 4's forefoot stack is 31 mm, 1 mm thinner than Saucony Endorphin Pro 5's 32 mm.
  • Nike Alphafly 4's weight is 188 g, 44 g lighter than Saucony Endorphin Pro 5's 232 g.
  • Rocker onset is about the same: 77 % of length for Nike Alphafly 4, 76 % of length for Saucony Endorphin Pro 5.

Nike Alphafly 4 details · Saucony Endorphin Pro 5 details · Add more shoes