This page is a preview based on early news and info and will be updated with a full hands-on review upon launch.

On Running Cloudboom Max Preview

The running world is buzzing with anticipation as On Running prepares to drop its most ambitious marathon racer to date: the Cloudboom Max. Positioned as the Swiss brand's answer to the super-shoe dominance seen in major marathons, this model aims to bridge the gap between maximalist cushioning and the precision-engineered energy return that elite athletes demand.

For fitness enthusiasts and competitive marathoners, the Cloudboom Max represents a significant shift in philosophy for the company. While On has historically favoured firm, ground-feel oriented designs, this silhouette looks set to prioritise pure, high-stack energy absorption.

Evolution: The history of the shoe line

To understand the gravity of the Cloudboom Max, one must look at the lineage of the Cloudboom series. The original Cloudboom was a slim, aggressive racer that prioritised agility. It was followed by the Cloudboom Echo, which introduced more carbon-fibre technology but maintained a somewhat traditional On aesthetic.

With the subsequent release of the Cloudboom Echo 3, On began experimenting with higher stack heights and more responsive foams. The Cloudboom Max is the natural evolution of this trajectory, moving away from the thin-soled origins towards a modern, super-foam dominated geometry that aligns with current market standards.

What are the press saying?

Early industry reports from major publications suggest that the Cloudboom Max is being tested in top-tier track and road environments. Press outlets have noted that the brand is focusing heavily on the geometry of the rocker, which appears more exaggerated than in previous iterations.

Journalists are highlighting the secretiveness surrounding the foam composition. There is a general consensus that if On successfully manages the weight-to-cushioning ratio, this shoe will be a formidable competitor against other industry giants. The focus remains on whether it can provide a 'bouncy' sensation that doesn't compromise on lateral stability.

What are the review sites saying?

Review sites are currently in a state of speculative excitement. Many experts suggest that the Cloudboom Max will be the shoe that defines the brand's future in the professional marathon circuit. The consensus is that testers are looking for a 'snappy' transition that makes high-speed running feel effortless.

Speculation is rife regarding the inclusion of an updated Speedboard. Enthusiasts are hoping for a design that works in harmony with the new, thicker midsole foam to prevent the shoe from feeling too 'mushy' during the latter stages of a 42-kilometre race.

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Performance Expectations: What improvements are expected?

The primary performance goal for the Cloudboom Max is energy return. Users should expect a significant increase in the 'rebound' effect when compared to the Echo series. Improved gait efficiency is the core promise here, particularly for runners looking to maintain their pace between the 30-kilometre and 42-kilometre marks.

We also anticipate improvements in durability. Previous models in this category sometimes struggled with outsole wear; the Cloudboom Max is expected to feature a more robust rubber compound designed for road grip and longevity without adding unnecessary grams to the overall weight.

Special Features & Technical Specifications

Technical details for the Cloudboom Max revolve around the proprietary CloudTec Phase cushioning. This system is designed to compress in a way that creates a smooth wave of transition from heel to toe. The integration of a carbon-infused plate remains a key technical pillar, designed to offer stiffness where it is needed most.

The upper is expected to be a high-tenacity, ultra-lightweight mesh, focusing on breathability and a secure lock-down feel. The total stack height is expected to push the boundaries of what On has previously manufactured, likely sitting right at the edge of the legal limits set by World Athletics.

Comfort & Fit

On has a reputation for a snug, performance-oriented fit, and the Cloudboom Max appears to follow suit. While it is built for speed, early indications are that the heel collar has been redesigned to improve comfort and reduce the risk of blistering during long efforts.

The midfoot lockdown is expected to be superior, ensuring that the foot does not shift during technical corners or sharp turns. It is worth noting that for runners with wider feet, sizing up might be a necessary consideration, as is common with most elite-level racing shoes.

Top 5 Features

• CloudTec Phase technology for ultra-smooth transitions.
• Optimised carbon-infused Speedboard for maximum propulsion.
• Lightweight, breathable engineered upper for temperature regulation.
• Maximalist stack height for improved impact protection.
• High-traction rubber outsole designed for diverse road conditions.

Release Date & Pricing Information

While an official launch date is still being kept under wraps, industry insiders point towards a late 2024 or early 2025 rollout to coincide with the start of the spring marathon season. Pricing is expected to be premium, likely sitting in the £250 to £280 range, reflecting its status as a top-tier racing shoe.

10 alternative shoes to try

1. Nike Alphafly 3: The benchmark for carbon-plated racers. It offers an incredible air-cushioning system in the forefoot that provides unmatched energy return, making it the primary rival for any new shoe entering the market. It is ideal for runners chasing personal bests in long-distance races who need a proven, high-performance platform.
2. Adidas Adizero Adios Pro 3: Known for its exceptional Lightstrike Pro foam and EnergyRods, this shoe provides a very stable yet bouncy ride. It is highly favoured by marathon runners who prefer a slightly wider base for cornering. The durability of the outsole rubber is also a standout feature for long-distance training cycles.
3. Saucony Endorphin Elite: A bold departure from previous designs, the Elite uses a unique foam geometry that feels incredibly snappy. Its aggressive rocker encourages a quick turnover, making it perfect for runners who want to maintain high cadences throughout their race. It is a top choice for those who value lightweight materials.
4. ASICS Metaspeed Sky Paris: Designed specifically for stride-style runners, this shoe maximises vertical rebound. The FF Turbo Plus foam is exceptionally light and provides a soft, forgiving feel underfoot. It is widely considered one of the most comfortable high-performance shoes, balancing intense energy return with a plush interior finish.
5. New Balance FuelCell SuperComp Elite v4: This shoe excels in comfort and transition smoothness. The FuelCell foam is incredibly soft, making it a great option for runners who find other 'super shoes' too firm or jarring. It provides a luxurious ride without sacrificing the speed-focused engineering required for marathon competition.
6. Hoka Rocket X 2: With its dual-density foam setup and integrated spoon-shaped carbon plate, this shoe provides a very propulsive ride. Hoka has engineered this to be highly responsive and lightweight, appealing to runners who appreciate a secure, glove-like fit that holds the foot firmly in place during high-intensity efforts.
7. Brooks Hyperion Elite 4: This shoe offers a more traditional feel while still incorporating the necessary carbon-fibre plate and energy-returning foams. It is a fantastic option for runners who find overly radical rocker geometries uncomfortable and prefer a more natural, stable platform that still provides plenty of speed for race day.
8. Puma Deviate Nitro Elite 3: Puma has made massive strides in foam technology recently. This shoe is remarkably light and offers a very responsive, snappy feel. It is an excellent choice for runners looking for a high-value, high-performance shoe that punches above its weight in terms of durability and consistent performance.
9. Mizuno Wave Rebellion Pro 2: Featuring a radical, decoupled heel design, this shoe is built for pure speed. The unique geometry encourages an immediate transition to the forefoot, making it ideal for runners with a strong forward lean. It is a bold, innovative choice for those looking for something different from mainstream designs.
10. On Cloudboom Echo 3: If you are already a fan of the On ecosystem, the Echo 3 is the perfect predecessor to the Max. It offers a very firm, ground-connected feel that many experienced runners prefer. It is an excellent choice for shorter distance races or intervals where you want to feel the road surface.