Which is lighter, the Saucony Endorphin Speed 1 or the Endorphin Speed 2?

Neither by a meaningful margin. Both weigh about 7.8 oz in a men's US 9.

Do the Saucony Endorphin Speed 1 and Endorphin Speed 2 come in the same widths?

Yes. Both run in D for men's sizes, so a width that fit in the Endorphin Speed 1 carries over to the Endorphin Speed 2.

How do the stack heights compare?

35.5 mm heel and 27.5 mm forefoot on the Saucony Endorphin Speed 1, against 35.5 mm and 27.5 mm on the Endorphin Speed 2. Same platform under both.

Is the Endorphin Speed 2 still the newest Endorphin Speed?

No. The Endorphin Speed 3 replaced it in 2022, so the Endorphin Speed 2 now sells as an older model and usually below its $160 list price.

Saucony Endorphin Speed 1 vs Endorphin Speed 2

Updated July 31, 2026. Specs are men's US 9.

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Refined, same shoe

THE SHORT ANSWER

The Endorphin Speed 2, by default. Amazon's Saucony Endorphin Speed 1 stock is gone in both men's and women's sizes, so what follows is a record of what changed, not a choice you still have.

Endorphin Speed 1 · 2020

Endorphin Speed 2 · 2021

Every spec, side by side

Spec	Endorphin Speed 1	Endorphin Speed 2
FIT AND WEIGHT
Weight	7.8 oz	7.8 oz
Widths	D	D
Upper	FORMFIT engineered mesh with 3D-printed overlays	Engineered mono-mesh with a gusseted tongue
	The whole update. The platform underneath carried over unchanged, and so did the price.
CUSHIONING GEOMETRY
Heel stack	35.5 mm	35.5 mm
Forefoot stack	27.5 mm	27.5 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	Full-length S-curve nylon plate
VALUE
List price at launch	$160	$160
OTHER CHANGES
Heel hold	Light collar, heel slip for some	Reinforced collar with extra overlays

Weighing whether to switch at all, rather than which of these two to buy? What replaced the Saucony Endorphin Speed 1 covers the verdict on the update, what loyalists made of it, and the closest alternatives from other brands.

Buy the Endorphin Speed 1

Old stock gone

Amazon's stock of the Saucony Endorphin Speed 1is gone in both men's and women's sizes, and discontinued stock does not come back.

Old stock is gone. See what replaced it

Buy the Endorphin Speed 2

Old stock gone

Amazon's stock of the Saucony Endorphin Speed 2is gone in both men's and women's sizes, and discontinued stock does not come back. The best current match is the Saucony Kinvara 16.

Saucony Kinvara 16 at Amazon

Questions runners ask

Which is lighter, the Saucony Endorphin Speed 1 or the Endorphin Speed 2?: Neither by a meaningful margin. Both weigh about 7.8 oz in a men's US 9.
Do the Saucony Endorphin Speed 1 and Endorphin Speed 2 come in the same widths?: Yes. Both run in D for men's sizes, so a width that fit in the Endorphin Speed 1 carries over to the Endorphin Speed 2.
How do the stack heights compare?: 35.5 mm heel and 27.5 mm forefoot on the Saucony Endorphin Speed 1, against 35.5 mm and 27.5 mm on the Endorphin Speed 2. Same platform under both.
Is the Endorphin Speed 2 still the newest Endorphin Speed?: No. The Endorphin Speed 3 replaced it in 2022, so the Endorphin Speed 2 now sells as an older model and usually below its $160 list price.