Can I go straight from the Saucony Endorphin Speed 2 to the Endorphin Speed 4 and skip the Endorphin Speed 3?

You can, but treat the Endorphin Speed 4 as a new shoe rather than a restock. Both the Endorphin Speed 3 and the Endorphin Speed 4 reworked the ride, so a Endorphin Speed 2 owner takes two character changes at once: PWRRUN PB foam (expanded-bead PEBA) became PWRRUN PB foam (expanded-bead PEBA).

How much did the weight change across these two updates?

0.4 oz on in total, 7.8 oz to 8.2 oz in a men's US 9. The Endorphin Speed 3 took it to 8.1 oz first.

Is the Endorphin Speed 3 the better buy than either of these?

On paper it splits them: 8.1 oz against 7.8 oz for the Endorphin Speed 2 and 8.2 oz for the Endorphin Speed 4, on a 36 mm heel and a $170 list price. Whether that is worth chasing depends on what the Endorphin Speed 3 update actually did, which the section above works through.

Where does the Endorphin Speed 4 sit in the Endorphin Speed lineup now?

Two versions on from the Endorphin Speed 2, and already replaced itself: the Endorphin Speed 5 arrived in 2025. If you are shopping old stock anyway, price the Endorphin Speed 4 against it before deciding.

Saucony Endorphin Speed 2 vs Endorphin Speed 4

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

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THE SHORT ANSWER

Two updates and 3 years separate the Saucony Endorphin Speed 2 from the Endorphin Speed 4. Net change: 0.4 oz heavier, $10 more at list. Both updates in between reworked the ride, so the Endorphin Speed 4 is two character changes away from what you own.

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

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

Endorphin Speed 2 · 2021

Endorphin Speed 4 · 2024

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 2 to Endorphin Speed 32022Changed character
Endorphin Speed 2 vs 3 What replaced the Saucony Endorphin Speed 2?
Step 2Endorphin Speed 3 to Endorphin Speed 42024Changed character
Endorphin Speed 3 vs 4 What replaced the Saucony Endorphin Speed 3?

Endorphin Speed 2 vs Endorphin Speed 4: 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 2	Endorphin Speed 4
FIT AND WEIGHT
Weight	7.8 oz	8.2 oz
Widths	D	D
Upper	Engineered mono-mesh with a gusseted tongue	Zonal engineered mesh with a gusseted tongue
CUSHIONING GEOMETRY
Heel stack	35.5 mm	36 mm
Forefoot stack	27.5 mm	28 mm
Drop	8 mm	8 mm
MATERIALS
Midsole	PWRRUN PB foam (expanded-bead PEBA)	PWRRUN PB foam (expanded-bead PEBA)
Plate	Full-length S-curve nylon plate	Re-engineered winged nylon plate
VALUE
List price at launch	$160	$170

Or buy the Endorphin Speed 3 instead?

The Endorphin Speed 3 is worth a look only if you want the ride it introduced, because that is the update that changed the shoe. Buying it to soften the jump does not work: you would be adapting to the same change either way, just at an older spec.

Buy the Endorphin Speed 3

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 2 to the Endorphin Speed 4 and skip the Endorphin Speed 3?: You can, but treat the Endorphin Speed 4 as a new shoe rather than a restock. Both the Endorphin Speed 3 and the Endorphin Speed 4 reworked the ride, so a Endorphin Speed 2 owner takes two character changes at once: PWRRUN PB foam (expanded-bead PEBA) became PWRRUN PB foam (expanded-bead PEBA).
How much did the weight change across these two updates?: 0.4 oz on in total, 7.8 oz to 8.2 oz in a men's US 9. The Endorphin Speed 3 took it to 8.1 oz first.
Is the Endorphin Speed 3 the better buy than either of these?: On paper it splits them: 8.1 oz against 7.8 oz for the Endorphin Speed 2 and 8.2 oz for the Endorphin Speed 4, on a 36 mm heel and a $170 list price. Whether that is worth chasing depends on what the Endorphin Speed 3 update actually did, which the section above works through.
Where does the Endorphin Speed 4 sit in the Endorphin Speed lineup now?: Two versions on from the Endorphin Speed 2, and already replaced itself: the Endorphin Speed 5 arrived in 2025. If you are shopping old stock anyway, price the Endorphin Speed 4 against it before deciding.