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On Cloudsurfer 1 vs Cloudsurfer 2

Updated October 13, 2026. Specs are men's US 9.

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Changed character

THE SHORT ANSWER

The Cloudsurfer 2, by default. Amazon's On Cloudsurfer 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.

Availability last checked Oct 13, 2026. Prices and stock change without notice.

On Cloudsurfer 1, side profile
Cloudsurfer 1 · 2023
On Cloudsurfer 2, men's shoe, side profile
Cloudsurfer 2 · 2025

Every spec, side by side

SpecCloudsurfer 1Cloudsurfer 2
FIT AND WEIGHT
Weight8.6 oz9.2 oz
Up 0.6 oz on On's own figures, most of it the added outsole rubber. Retailers and RunRepeat's scale both put the 2 nearer 9.0 oz; this page uses On's number for both generations so the comparison stays internally consistent.
WidthsDD
UpperDope-dyed engineered mesh, 100 percent recycled polyester, with a gusseted tongueBreathable engineered mesh with TPU eyelet reinforcements and an ungusseted tongue
Breathability improved, which answered a real complaint. The tongue lost its gusset and its padding, which is the change Believe in the Run described as cardboard-like and RunRepeat lists as a con.
CUSHIONING GEOMETRY
Heel stack32 mm32 mm
Forefoot stack22 mm23 mm
Drop10 mm9 mm
MATERIALS
MidsoleHelion superfoam in CloudTec Phase geometryFirmer Helion superfoam in an evolved CloudTec Phase geometry
The whole argument about this shoe. The foam is denser and the Phase voids were re-optimized with a slight lateral bias. It lasts longer and it is less fun, and reviewers and owners disagreed about which of those matters more.
VALUE
List price at launch$160$160
OTHER CHANGES
OutsoleSparse rubber coverageExpanded, thicker rubber coverage
RunRepeat measured 0.6 mm of wear against the original 0.9 mm in the same test. It also firms the ride, so the durability fix and the softness complaint are the same change.
LacingElastic forward lacing, prone to tanglingTraditional eyelets
A small fix to a real annoyance on the original.
Pod squeakCloudTec Phase pods developed an audible squeakGone
Owners of the original reported squeaking after as little as a month of wear. Reviewers confirmed it is absent on the 2.

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

Buy the Cloudsurfer 1

Old stock gone

Amazon's stock of the On Cloudsurfer 1 is 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 Cloudsurfer 2

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.

Availability last checked Oct 13, 2026.

Questions runners ask

Which is lighter, the On Cloudsurfer 1 or the Cloudsurfer 2?
The On Cloudsurfer 1, by 0.6 oz in a men's US 9 (8.6 oz vs 9.2 oz).
Do the On Cloudsurfer 1 and Cloudsurfer 2 come in the same widths?
Yes. Both run in D for men's sizes, so a width that fit in the Cloudsurfer 1 carries over to the Cloudsurfer 2.
How do the stack heights compare?
32 mm heel and 22 mm forefoot on the On Cloudsurfer 1, against 32 mm and 23 mm on the Cloudsurfer 2. That is 0 mm less under the heel and 1 mm more under the forefoot.
Is the Cloudsurfer 2 still the newest Cloudsurfer?
No. The Cloudsurfer 3 replaced it in 2026, so the Cloudsurfer 2 now sells as an older model and usually below its $160 list price.