Which is lighter, the Asics Novablast 4 or the Novablast 5?

Neither by a meaningful margin. Both weigh about 9.1 oz in a men's US 9.

Do the Asics Novablast 4 and Novablast 5 come in the same widths?

Yes. Both run in D, 2E for men's sizes, so a width that fit in the Novablast 4 carries over to the Novablast 5.

How do the stack heights compare?

41.5 mm heel and 33.5 mm forefoot on the Asics Novablast 4, against 41.5 mm and 33.5 mm on the Novablast 5. Same platform under both.

Is the Novablast 5 still the newest Novablast?

No. The Novablast 6 replaced it in 2026, so the Novablast 5 now sells as an older model and usually below its $140 list price.

Asics Novablast 4 vs Novablast 5

Updated August 2, 2026. Specs are men's US 9.

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THE SHORT ANSWER

Whichever your size still exists in. The Novablast 4 is discontinued at retail, so remaining pairs sell against a thinning size run, while the Novablast 5 has a full one.

Asics Novablast 4Sizes running outMen's at Amazon Women's
Asics Novablast 5Men's at Amazon Women's

Availability last checked Aug 2, 2026. Prices and stock change without notice.

Novablast 4 · 2023

Novablast 5 · 2024

Every spec, side by side

Spec	Novablast 4	Novablast 5
FIT AND WEIGHT
Weight	9.1 oz	9 oz
	Claimed figures disagree at the margin (RoadTrailRun and Running Warehouse say 8.7 to 8.8 oz); Believe in the Run's office pairs of the 4 and 5 weighed the same.
Widths	D, 2E	D, 2E
Upper	Woven upper with a stretch tongue	Engineered jacquard mesh
	Roomy; low-volume feet swim a little.
CUSHIONING GEOMETRY
Heel stack	41.5 mm	41.5 mm
Forefoot stack	33.5 mm	33.5 mm
Drop	8 mm	8 mm
MATERIALS
Midsole	FF Blast+ Eco	FF Blast Max
	Asics claimed roughly 8.5 percent more bounce; testers called it the plushest foam in a Novablast yet. The 4-to-5 swing is the direct counter-correction to the 3-to-4 one.
VALUE
List price at launch	$140	$140
	Asics raised it to $150 during 2025.
OTHER CHANGES
Platform	Widest base in the line	About 5 mm narrower at heel and forefoot
	Less rear flare also fixed the 4's heel slap.

Weighing whether to switch at all, rather than which of these two to buy? What replaced the Asics Novablast 4 covers the verdict on the update, what loyalists made of it, and the closest alternatives from other brands.

Buy the Novablast 4

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 Aug 2, 2026.

Buy the Novablast 5

Stocked at Amazon

Men's: Check price at Amazon Women's: Check price at Amazon

Availability last checked Aug 2, 2026.

Questions runners ask

Which is lighter, the Asics Novablast 4 or the Novablast 5?: Neither by a meaningful margin. Both weigh about 9.1 oz in a men's US 9.
Do the Asics Novablast 4 and Novablast 5 come in the same widths?: Yes. Both run in D, 2E for men's sizes, so a width that fit in the Novablast 4 carries over to the Novablast 5.
How do the stack heights compare?: 41.5 mm heel and 33.5 mm forefoot on the Asics Novablast 4, against 41.5 mm and 33.5 mm on the Novablast 5. Same platform under both.
Is the Novablast 5 still the newest Novablast?: No. The Novablast 6 replaced it in 2026, so the Novablast 5 now sells as an older model and usually below its $140 list price.