ShoeGeometry

Saucony Endorphin Speed 6 vs Saucony Endorphin Speed 5

What changed from the Saucony Endorphin Speed 5: toe rocker shorter, stack higher. Each cell carries a provenance badge; open a shoe for sources.

heel boneSaucony Endorphin Speed 6: heel 38 mm, forefoot 30 mm (drop 8 mm); toe rocker 32 % of length, radius 35 % of length; heel bevel 17 % of length, 26 mm high at the back, reaching in front of the heel bone (the sole still curves up under it: a heel rocker).Saucony Endorphin Speed 6: toe rocker 32 % of lengthSaucony Endorphin Speed 5: heel 36 mm, forefoot 28 mm (drop 8 mm); toe rocker 36 % of length, radius 38 % of length; heel bevel 12 % of length, 21 mm high at the back, ending about under the heel bone.Saucony Endorphin Speed 5: toe rocker 36 % of length
  • Saucony Endorphin Speed 638/30 mm · toe rocker 32 % · heel bevel 17 %
  • Saucony Endorphin Speed 536/28 mm · toe rocker 36 % · heel bevel 12 %
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

MeasureSaucony Endorphin Speed 5Saucony Endorphin Speed 6Change
Heel stack36 mm38 mmhigher (+2 mm)
Forefoot stack28 mm30 mmhigher (+2 mm)
Drop8 mm8 mmabout the same
Weight237 g230 gabout the same
Toe rocker36.2% of length32% of lengthshorter (−4.2 %)
Toe tip over ground40.1 mm42.7 mmabout the same
Rocker rise angle28.6°30.2°about the same
FoamPWRRUN PBPWRRUN PBX (beaded PEBA)unclear: 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

MetricSaucony Endorphin Speed 6
Tempo · Road
Saucony Endorphin Speed 5
Tempo · Road
Heel-to-toe drop8 mmStated8 mmStated
Heel stack38 mmStated36 mmStated
Forefoot stack30 mmStated28 mmStated
Weight230 gStated237 gStated
Toe rocker32 %est.36 %est.
Rocker radius35 %est.38 %est.
Rocker rise angle30 degest.29 degest.
Rocker angle at toe53 degest.59 degest.
Toe tip over ground43 mm*est.40 mm*est.
Visible rocker lift onset79.5 %est.76.1 %est.
Toe spring (relative)19.5 %est.18.6 %est.
Heel bevel length16.5 %*est.11.6 %*est.
Heel bevel height26 mmest.21 mm*est.
Midsole width (forefoot)—118.1 mmMeasured
Midsole width (heel)—95 mmMeasured
Toe box shape76 %est.72 %*est.
Interior forefoot width—93.8 mmMeasured
Toebox width—72.9 mmMeasured
Longitudinal stiffness—26Derived
Midsole firmness—93Derived
PlateNylon plateNylon plate
Primary foamPWRRUN PBX (beaded PEBA)PWRRUN PB
List price$180$175

Key differences

  • Heel-to-toe drop is about the same: 8 mm for Saucony Endorphin Speed 6, 8 mm for Saucony Endorphin Speed 5.
  • Saucony Endorphin Speed 6's heel stack is 38 mm, 2 mm thicker than Saucony Endorphin Speed 5's 36 mm.
  • Saucony Endorphin Speed 6's forefoot stack is 30 mm, 2 mm thicker than Saucony Endorphin Speed 5's 28 mm.
  • Weight is about the same: 230 g for Saucony Endorphin Speed 6, 237 g for Saucony Endorphin Speed 5.
  • Saucony Endorphin Speed 6's toe rocker is 32 % of length, 4 % of length shorter than Saucony Endorphin Speed 5's 36 % of length.

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