Can I go straight from the Saucony Endorphin Speed 4 to the Endorphin Speed 6 and skip the Endorphin Speed 5?

Yes, but going Endorphin Speed 4 to Endorphin Speed 6 means taking one change in a single step: the Endorphin Speed 6 is where the ride moved. Drop holds at 8 mm, so the difference is foam and fit rather than geometry: PWRRUN PB foam (expanded-bead PEBA) to PWRRUN PBX foam.

How much did the weight change across these two updates?

0.4 oz off in total, 8.2 oz to 7.8 oz in a men's US 9. The Endorphin Speed 5 took it to 8.4 oz first.

Is the Endorphin Speed 5 the better buy than either of these?

On paper it splits them: 8.4 oz against 8.2 oz for the Endorphin Speed 4 and 7.8 oz for the Endorphin Speed 6, on a 36 mm heel and a $175 list price. Whether that is worth chasing depends on what the Endorphin Speed 5 update actually did, which the section above works through.

Did the Endorphin Speed get taller between the Endorphin Speed 4 and the Endorphin Speed 6?

Heel stack went 36 mm to 39 mm, by way of 36 mm on the Endorphin Speed 5. Drop held at 8 mm throughout, so the extra foam sits under both ends.

Where does the Endorphin Speed 6 sit in the Endorphin Speed lineup now?

It is the current model, two versions on from the Endorphin Speed 4 and the newest one you can buy at full retail.

Saucony Endorphin Speed 4 vs Endorphin Speed 6

Two versions apart. Updated September 10, 2026. Specs are men's US 9.

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THE SHORT ANSWER

Two updates and 2 years separate the Saucony Endorphin Speed 4 from the Endorphin Speed 6. Net change: 0.4 oz lighter, 3 mm more heel stack, a new midsole, $5 more at list. The Endorphin Speed 6 is where the character changed, and that is the update Endorphin Speed 4 owners notice first.

Saucony Endorphin Speed 4Sizes running outMen's at Amazon Women's
Saucony Endorphin Speed 6Stock unverifiedMen's at Amazon Women's

Availability last checked Sep 10, 2026. Prices and stock change without notice.

Endorphin Speed 4 · 2024

Endorphin Speed 6 · 2026

The two updates in between

Each step has its own page with the full change list and the verdict on that update.

Step 1Endorphin Speed 4 to Endorphin Speed 52025Refined, same shoe
Endorphin Speed 4 vs 5 What replaced the Saucony Endorphin Speed 4?
Step 2Endorphin Speed 5 to Endorphin Speed 62026Changed character
Endorphin Speed 5 vs 6 What replaced the Saucony Endorphin Speed 5?

Endorphin Speed 4 vs Endorphin Speed 6: every spec, side by side

The net of both updates. Per-update change notes stay on the step pages above, because they explain changes measured from a different starting point than this table uses.

Spec	Endorphin Speed 4	Endorphin Speed 6
FIT AND WEIGHT
Weight	8.2 oz	7.8 oz
Widths	D	D, 2E
Upper	Zonal engineered mesh with a gusseted tongue	Lightweight engineered mesh
CUSHIONING GEOMETRY
Heel stack	36 mm	39 mm
Forefoot stack	28 mm	31 mm
Drop	8 mm	8 mm
MATERIALS
Midsole	PWRRUN PB foam (expanded-bead PEBA)	PWRRUN PBX foam
Plate	Re-engineered winged nylon plate	Redesigned nylon plate
VALUE
List price at launch	$170	$175

Or buy the Endorphin Speed 5 instead?

The Endorphin Speed 5 is the value play if you find it discounted. It carries most of what the Endorphin Speed 6 added while selling as an older model, and moving one version at a time is the smaller adjustment.

Buy the Endorphin Speed 5

Sizes running out

Discontinued at retail. Amazon carries what remains, so treat an in-stock size as a closing window, and expect prices to swing.

Men's: Check remaining stock Women's: Check remaining stock

Availability last checked Sep 10, 2026.

Questions runners ask

Can I go straight from the Saucony Endorphin Speed 4 to the Endorphin Speed 6 and skip the Endorphin Speed 5?: Yes, but going Endorphin Speed 4 to Endorphin Speed 6 means taking one change in a single step: the Endorphin Speed 6 is where the ride moved. Drop holds at 8 mm, so the difference is foam and fit rather than geometry: PWRRUN PB foam (expanded-bead PEBA) to PWRRUN PBX foam.
How much did the weight change across these two updates?: 0.4 oz off in total, 8.2 oz to 7.8 oz in a men's US 9. The Endorphin Speed 5 took it to 8.4 oz first.
Is the Endorphin Speed 5 the better buy than either of these?: On paper it splits them: 8.4 oz against 8.2 oz for the Endorphin Speed 4 and 7.8 oz for the Endorphin Speed 6, on a 36 mm heel and a $175 list price. Whether that is worth chasing depends on what the Endorphin Speed 5 update actually did, which the section above works through.
Did the Endorphin Speed get taller between the Endorphin Speed 4 and the Endorphin Speed 6?: Heel stack went 36 mm to 39 mm, by way of 36 mm on the Endorphin Speed 5. Drop held at 8 mm throughout, so the extra foam sits under both ends.
Where does the Endorphin Speed 6 sit in the Endorphin Speed lineup now?: It is the current model, two versions on from the Endorphin Speed 4 and the newest one you can buy at full retail.