Is the Cloudboom Max worth it for a marathon?

If you race long distances at a steady fast pace and want a carbon-plated shoe, yes. It is built for race-day speed, so it makes less sense as a daily trainer.

How does it compare with the Cloudboom Echo?

The Max uses a dual-layer Helion HF midsole with a more extreme rocker and a full-length carbon Speedboard, positioning it as On's top long-distance racer. Expect a stiffer, more propulsive feel than softer super-shoes.

Does it fit true to size?

It is listed in standard men's sizes with a regular width, and most runners take their usual On size. The race fit is snug through the midfoot, so try it on if you are between sizes.

No. The shoe is listed as not slip resistant in wet conditions, and owners report losing grip on wet roads. Save it for dry race days.

Can I use it for everyday training?

It can handle fast long runs, but the stiff plate and aggressive rocker are tuned for racing. Most runners keep it for workouts and race day.

One pair of On Cloudboom Max running shoes in the white and black colorway. Sizing runs in standard men's sizes with a regular width.

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This hour's deals

−50%

Shoes · Extra Butter

On running shoes built for race day

On Cloudboom Max Men's Running Shoes

The On Cloudboom Max men's running shoes, for runners chasing a fast road effort.

Deal score 5.1 · Good deal

$115.00$230.00 Extra Butter's regular price

You save $115.00 at Extra Butter

Deal.ai's agents found this deal on November 11. The store may have changed its price since.

Why it's a great deal

Elsewhere right now: Junlly Store $125.97, OnTrack Supply $125.97, Andrew Store $129.72, and 27 more (typical $161.25 across 30 stores)
Cheaper than all 30 other stores selling it right now
Extra Butter lists its regular price at $230.00: 50% off by its own figures
Rated 4.3 out of 5 by 28 buyers

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About it

The On Cloudboom Max "White / Black" delivers a clinical, high-status execution of On’s premier long-distance racing weapon, masterfully blending "CloudTec®" heritage with a radical, hyper-aggressive technicality. This iteration features a premium engineered mesh upper with a specialized grayscale gradient, providing a lightweight, multi-dimensional foundation for the model’s ultra-streamlined anatomical profile. The design is defined by its explosive strike, utilizing a specialized dual-layer Helion™ superfoam midsole with extreme rocker geometry that injects a layer of high-octane luxury into the propulsive ride. Grounded by a full-length carbon Speedboard® for elite energy return and finished with bold, high-contrast black branding, this release successfully pairs On’s aggressive speed DNA with a sophisticated, "Monochrome-Velocity" aesthetic.

From Lyst

Engineered for marathon training
CloudTec® cushioning system
Double layer of Helion™ HF hyper foam
Glass fiber-infused Speedboard®
Lightweight, breathable mesh upper
Padded heel design

Sizes: US 8
Materials: Mesh/Polyester/Polyester
Fit: Regular fit
Sizing: For up-to-date size availability and fit information, please visit the retailer.

Specs

Numeric Size: 42.5
Fit Width: No information, Regular
Gender Size: Men's 43, Men's 41, Men's 42, Men's 42.5, Men's 44
Men'S Size: 42.5
Age Group Size: Adult size
Slip Resistant: No (in wet conditions)
Occasion: Competition, Marathons, Marathon training
Weightlifting Shoes: No
Fashion Sneaker: No
Flats: No

About the On Cloudboom Max Men's Running Shoes

The On Cloudboom Max is On's long-distance road racing shoe, built around a dual-layer Helion HF superfoam midsole, a full-length carbon Speedboard and CloudTec cushioning. It is aimed at marathon racing and fast training, with an aggressive rocker and a lightweight engineered mesh upper. It suits neutral runners chasing a fast race day; the stiff plate and extreme rocker make it a poor fit for easy daily miles, and owners report weak grip on wet roads.

Best forMarathon and half-marathon racersRunners chasing a carbon-plated PRFast long-run trainingNeutral runners with a mid-to-forefoot strike

Pros

Full-length carbon Speedboard gives a stiff, propulsive toe-off
Dual-layer Helion HF foam returns energy over long distances
Light, streamlined build for race day
Aggressive rocker rolls the foot forward through the stride
Breathable engineered mesh upper with a clean white/black look

Cons

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