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FAQ + live marketUpdated 2026-03-11
On Running Cloudboom Max
On Running's carbon-plated racing shoe that targets marathon performance with maximalist cushioning, earning respect in the competitive racing shoe market.
Guide Score
82/100
Very GoodLensRunning
Comfort8/10
Durability5/10
SizingTrue to size
WidthNarrow fit
Dress codeAthletic
CushioningEVA
This is our 0-100 guide score for the shoe overall. Higher is better. It is not a stock number or a price score.
How to trust it
The Sources section links to 8 pages we used or checked.
This is a SoleFeed guide page with live store data.
Moderate evidence — enough to identify patterns
Key facts
- Popularity: Growing among competitive runners looking beyond Nike
- Comfort: Cloudprime foam provides responsive, high-energy-return cushioning
- Fit: Performance fit, true to size, slightly narrow
- Value: $270-300, premium racing shoe pricing
- Use case: Marathon racing, competitive long-distance events
- Risk: Very expensive and designed only for race day, not training
Shoe intelligence
Comfort 8/10Durability 5/10True to sizeNarrow fitRunning
Guide
Full breakdown
The On Cloudboom Max is a carbon-plated racing shoe featuring Cloudprime cushioning (a PEBAX-based superfoam), a Speedboard with carbon fiber, and a lightweight mesh upper. It targets the marathon and long-distance racing market dominated by Nike's Vaporfly and Alphafly lines. The Cloudboom Max represents On's most serious racing technology.
Questions answered
FAQ
Is the Cloudboom Max good for racing?
Yes, it is On's top racing shoe. The carbon plate and Cloudprime foam provide high energy return for competitive distances. It performs competitively with Nike's Vaporfly line.
How does it compare to the Nike Vaporfly?
Similar concept: carbon plate in a superfoam midsole for racing. The Vaporfly has a longer track record and more race wins. The Cloudboom Max offers a slightly firmer, more connected ride that some runners prefer.
Can you train in the Cloudboom Max?
Not recommended. It is a race-day shoe designed for peak performance over a limited lifespan. The foam and construction are not built for daily training miles. Save it for races.
Does it run true to size?
True to size with a narrow, performance-oriented fit. The racing design prioritizes lockdown and lightweight over roominess.
Sources & methodology
This page mixes guide writing with current store data.