Which is lighter, the Nike Pegasus 37 or the Pegasus 38?

The Nike Pegasus 37, by 0.2 oz in a men's US 9 (10 oz vs 10.2 oz).

Do the Nike Pegasus 37 and Pegasus 38 come in the same widths?

Yes. Both run in D, 2E, 4E for men's sizes, so a width that fit in the Pegasus 37 carries over to the Pegasus 38.

How do the stack heights compare?

28 mm heel and 18 mm forefoot on the Nike Pegasus 37, against 28 mm and 18 mm on the Pegasus 38. Same platform under both.

Is the Pegasus 38 still the newest Pegasus?

No. The Pegasus 39 replaced it in 2022, so the Pegasus 38 now sells as an older model and usually below its $120 list price.

Nike Pegasus 37 vs Pegasus 38

Updated July 28, 2026. Specs are men's US 9.

Amazon links on this page pay us a commission. It never changes your price. Details

Faithful successor

THE SHORT ANSWER

The Pegasus 38, by default. Amazon's Nike Pegasus 37 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.

Pegasus 37 · 2020

Pegasus 38 · 2021

Every spec, side by side

Spec	Pegasus 37	Pegasus 38
FIT AND WEIGHT
Weight	10 oz	10.2 oz
	The extra padding cost 0.2 oz. Nobody noticed on the run.
Widths	D, 2E, 4E	D, 2E, 4E
Upper	Thin translucent engineered mesh with a racing-style tongue	Padded engineered mesh with a wider toebox and a traditional tongue
	The 37's snug forefoot and thin tongue were its loudest complaints. The 38 went back to a conventional, roomier fit.
CUSHIONING GEOMETRY
Heel stack	28 mm	28 mm
Forefoot stack	18 mm	18 mm
Drop	10 mm	10 mm
MATERIALS
Midsole	React foam with a forefoot Zoom Air unit	React foam with a forefoot Zoom Air unit
VALUE
List price at launch	$120	$120

Weighing whether to switch at all, rather than which of these two to buy? What replaced the Nike Pegasus 37 covers the verdict on the update, what loyalists made of it, and the closest alternatives from other brands.

Buy the Pegasus 37

Old stock gone

Amazon's stock of the Nike Pegasus 37is 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 Pegasus 38

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 stock is gone.

Availability last checked Jul 1, 2026.

Questions runners ask

Which is lighter, the Nike Pegasus 37 or the Pegasus 38?: The Nike Pegasus 37, by 0.2 oz in a men's US 9 (10 oz vs 10.2 oz).
Do the Nike Pegasus 37 and Pegasus 38 come in the same widths?: Yes. Both run in D, 2E, 4E for men's sizes, so a width that fit in the Pegasus 37 carries over to the Pegasus 38.
How do the stack heights compare?: 28 mm heel and 18 mm forefoot on the Nike Pegasus 37, against 28 mm and 18 mm on the Pegasus 38. Same platform under both.
Is the Pegasus 38 still the newest Pegasus?: No. The Pegasus 39 replaced it in 2022, so the Pegasus 38 now sells as an older model and usually below its $120 list price.