ShoeGeometry

Nike Zoom Fly 6 vs Saucony Endorphin Trainer

Two shoes compared on measured geometry. Each cell carries a provenance badge; open a shoe for sources.

heel boneNike Zoom Fly 6: heel 40 mm, forefoot 32 mm (drop 8 mm); toe rocker 41 % of length, radius 55 % of length; heel bevel 13 % of length, 16 mm high at the back, ending about under the heel bone.Nike Zoom Fly 6: toe rocker 41 % of lengthSaucony Endorphin Trainer: heel 41 mm, forefoot 33 mm (drop 8 mm); toe rocker not measured, typical shape drawn; heel bevel 11 % of length, 24 mm high at the back, ending about under the heel bone.
  • Nike Zoom Fly 640/32 mm · toe rocker 41 % · heel bevel 13 %
  • Saucony Endorphin Trainer41/33 mm · toe rocker not measured · heel bevel 11 %
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.

Which suits you

If you wantPickBecause
A smoother roll at toe-offNike Zoom Fly 643.6 vs 36.3 mm toe tip
More cushioning under the heelAbout the same40 vs 41 mm heel stack
More under the forefootAbout the same32 vs 33 mm forefoot stack
A lower dropAbout the same8 vs 8 mm drop
A stiffer, snappier forefootSaucony Endorphin Trainer71 vs 93 /100 stiffness
A firmer, more stable feelNike Zoom Fly 662 vs 0 /100 firmness
A wider base under the forefootSaucony Endorphin Trainer111.9 vs 121.7 mm forefoot base

From the values below, with differences inside measurement noise shown as about the same. This describes the shoes, not what is right for your feet; comfort in the first few runs decides.

MetricNike Zoom Fly 6
Tempo · Road
Saucony Endorphin Trainer
Tempo · Road
Heel-to-toe drop8 mmStated8 mmStated
Heel stack40 mmStated41 mmStated
Forefoot stack32 mmStated33 mmStated
Weight265 gStated281 gStated
Toe rocker41 %est.—
Rocker radius55 %est.—
Rocker rise angle26 degest.—
Rocker angle at toe59 degest.—
Toe tip over ground44 mm*est.36 mm*est.
Visible rocker lift onset71.3 %est.—
Toe spring (relative)19.4 %est.—
Heel bevel length12.8 %*est.11 %est.
Heel bevel height16 mm*est.24 mmest.
Midsole width (forefoot)111.9 mmMeasured121.7 mmMeasured
Midsole width (heel)87.9 mmMeasured100.1 mmMeasured
Toe box shape75 %*est.—
Interior forefoot width90.9 mmMeasured92.3 mmMeasured
Toebox width72.6 mmMeasured70.1 mmMeasured
Longitudinal stiffness71Derived93Derived
Midsole firmness62Derived0Derived
PlateCarbon plateCarbon plate
Primary foamZoomX + SR-02IncrediRUN top layer over PWRRUN
List price$180$180

Key differences

  • Heel-to-toe drop is about the same: 8 mm for Nike Zoom Fly 6, 8 mm for Saucony Endorphin Trainer.
  • Nike Zoom Fly 6's heel stack is 40 mm, 1 mm thinner than Saucony Endorphin Trainer's 41 mm.
  • Nike Zoom Fly 6's forefoot stack is 32 mm, 1 mm thinner than Saucony Endorphin Trainer's 33 mm.
  • Nike Zoom Fly 6's weight is 265 g, 16 g lighter than Saucony Endorphin Trainer's 281 g.

Read more about both shoes

We measure the shape. For how they feel over many miles, and for lab tests of cushioning, grip and fit:

Nike Zoom Fly 6

Saucony Endorphin Trainer

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Nike Zoom Fly 6 details · Saucony Endorphin Trainer details · Add more shoes