ShoeGeometry

Adidas Adizero Boston 13 vs Saucony Endorphin Speed 6

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.

heel boneAdidas Adizero Boston 13: heel 37 mm, forefoot 30 mm (drop 7 mm); toe rocker 37 % of length, radius 41 % of length; heel bevel 5 % of length, 13 mm high at the back, ending behind the heel bone (only the back edge is rounded).Adidas Adizero Boston 13: toe rocker 37 % of lengthSaucony Endorphin Speed 6: heel 38 mm, forefoot 30 mm (drop 8 mm); toe rocker 31 % of length, radius 35 % of length; heel bevel 17 % of length, 28 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 31 % of length
  • Adidas Adizero Boston 1337/30 mm · toe rocker 37 % · heel bevel 5 %
  • Saucony Endorphin Speed 638/30 mm · toe rocker 31 % · heel bevel 17 %
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.
MetricAdidas Adizero Boston 13
Tempo · Road
Saucony Endorphin Speed 6
Tempo · Road
Heel-to-toe drop7 mmStated8 mmStated
Heel stack37 mmStated38 mmStated
Forefoot stack30 mmStated30 mmStated
Weight255 gStated230 gStated
Toe rocker37 %est.31 %est.
Rocker radius41 %est.35 %est.
Rocker rise angle28 degest.31 degest.
Rocker angle at toe56 degest.53 degest.
Toe tip over ground45 mm*est.43 mm*est.
Visible rocker lift onset76.6 %est.79.5 %est.
Toe spring (relative)18.8 %est.19.2 %est.
Heel bevel length5.4 %*est.16.5 %*est.
Heel bevel height13 mm*est.28 mmest.
Midsole width (forefoot)121 mmMeasured—
Midsole width (heel)83.8 mmMeasured—
Toe box shape—76 %est.
Interior forefoot width97.3 mmMeasured—
Toebox width70.6 mmMeasured—
Longitudinal stiffness39Derived—
Midsole firmness77Derived—
PlatePlate unknownNylon plate
Primary foamLightstrike ProPWRRUN PBX (beaded PEBA)
List price$160$180

Key differences

  • Adidas Adizero Boston 13's heel-to-toe drop is 7 mm, 1 mm lower than Saucony Endorphin Speed 6's 8 mm.
  • Adidas Adizero Boston 13's heel stack is 37 mm, 1 mm thinner than Saucony Endorphin Speed 6's 38 mm.
  • Forefoot stack is about the same: 30 mm for Adidas Adizero Boston 13, 30 mm for Saucony Endorphin Speed 6.
  • Adidas Adizero Boston 13's weight is 255 g, 25 g heavier than Saucony Endorphin Speed 6's 230 g.
  • Adidas Adizero Boston 13's toe rocker is 37 % of length, 5 % of length longer than Saucony Endorphin Speed 6's 31 % of length.

Adidas Adizero Boston 13 details · Saucony Endorphin Speed 6 details · Add more shoes