On Cloudboom Max

RTINGS praises the On Cloudboom Max as a sensible, stability-first marathon shoe for middle-of-the-pack runners: reviewers applaud its very tall stack, robust heel cushioning, wide platform, and controlled ride that make it comfortable and confidence-inspiring for 4-hour marathoners, while noting a firm plastic speedboard and lively forefoot that provide decent pop. However, the tone is measured rather than ecstatic—criticism centers on the shoe’s substantial weight, somewhat muted energy return compared with true super shoes, and an aggressive rocker that can feel awkward if your stride isn’t precise. The review stands out for detailed lab metrics (stack heights, energy-return percentages, firmness and absorption at multiple loads), clear comparisons to direct competitors and other On models, and practical guidance: choose the Cloudboom Max for stability and long-run protection, but opt for lighter, livelier plated alternatives if you prioritize racing efficiency.

RunRepeat’s Carlos Sánchez highlights the On Cloudboom Max as On’s first genuine super trainer—one that finally delivers markedly improved energy return, premium materials, exceptional durability, and table-like stability—while still feeling firmer, heavier, and much pricier than many rivals. Sánchez praises the dual-foam Helion HF setup and the fiberglass Speedboard for giving lively forefoot energy (69.7% ER) and controlled flex, and notes generous rubber coverage and strong grip (SATRA 0.64) that support longevity. However, lab metrics show below-expectation shock absorption (126 SA heel, 111 SA forefoot), a stiff bottom layer (49.6 AC), 286 g weight, and a near-$230 price that undermine versatility and pace changes. The reviewer recommends it mainly for On loyalists, mid/forefoot strikers, or runners seeking a stable, premium max-stack trainer who accept trade-offs in cushioning, weight, and value.

RoadTrailRun’s Sam Winebaum praises the On Cloudboom Max as a versatile, reliably stable “super trainer” that’s lively without being gimmicky. He’s enthusiastically positive about its reactive dual-foam midsole, flexible nylon/glass-fiber plate, smooth rocker, broad heel platform, and durable outsole—calling it a great one-shoe rotation for training and racing and likely to help everyday runners finish a first marathon. Criticisms are measured: the shoe is on the heavier side due to deliberate durable materials, and the dense, warm upper with a medial overlay caused brief bunion pressure and could be lighter for better breathability. Sam backs impressions with measured stats (weight, stack, foam hardness), multi-pace test runs, and side-by-side comparisons to Hoka, Brooks, and ASICS. Overall, the tone is strongly favorable and confident—practical praise tempered by specific, actionable caveats about fit and upper materials.

Doctors of Running highlights the On Cloudboom Max as a distinctive, polarizing super trainer: praised for its wide, comfortable toe box, firm dual-layer Helion HF midsole with a glass-infused Speedboard, and a rockered, stable ride that many testers loved for recovery and slow long runs, but criticized for being heavy, overly stiff—especially in the heel—and feeling clunky at faster paces. Reviewers split: Andrea calls it her favorite recovery/easy-run shoe for its centered, rolling feel and durability, while Matt finds the extended plate, lateral flare, and weight make transitions awkward and limits versatility. Unique insights include detailed biomechanical notes on sole flare, rocker timing, and how gait/loading rate changes performance; durability and traction impressed across reviewers. Overall, a niche but well-built option best suited to recreational >4-hour marathoners and runners who prefer a firmer, stable, slow-pace trainer despite its $230 price and weight.

RunToTheFinish praises the On Cloudboom Max as a lively, well-engineered “supertrainer” that adapts race‑shoe tech for average runners. Amanda Brooks expresses clear enthusiasm for its glass‑fiber nylon speedboard, Helion FM foam, stable wider base, and comfortable upper—calling it fun to run in and one of the shoes she reaches for when not testing. She highlights that it’s tailored for mid‑to‑back‑of‑the‑pack marathoners (4–6 hour racers) and heavier runners, offering cushioning, gentle rocker, and improved durability over narrow race flats. Criticisms are measured: its $230 price, heavier weight than true daily trainers, and limited long‑term durability for high‑mileage daily use; minor fit and tongue thinness are noted. Unique insights include the shoe’s deliberate tuning away from a rigid carbon plate toward a more flexible plated design and practical comparisons to Hoka, Nike, and Brooks alternatives. Overall, she gives it an 89% verdict.

Believe in the Run’s Karl Fernandez and Chad Zimmermann assess the On Cloudboom Max as a polarizing, well-intentioned shoe that ultimately falls short for its stated purpose. They praise its premium materials, breathable upper, stable dual-density Helion HF foams, and tidy race-day aesthetics, but both reviewers call out significant drawbacks: heavy mass for a racing shoe, a stiff, blocky ride with muted “pop,” and fit issues that caused blisters and toe crowding for each author in different sizes. Unique insights note the 40/32 mm stack with an 8% glass-fiber speedboard and that the model feels closer to an overbuilt max-cushion trainer than an energetic marathon racer. At $225–$230, the pair feels overpriced given lighter, more lively alternatives; the reviewers recommend On refine weight, geometry, and upper construction before positioning this as a true race-day option for midpack runners.

WearTesters' Drew Whitcomb assesses the On Cloudboom Max as a well-built, stable super shoe that ultimately falls short of its intended audience. He praises its measured forefoot bounce, durable outsole, breathable upper, and roomy fit, noting excellent lockdown and cornering; however, multiple reviewers and his own testing found the carbon-like speedboard excessively stiff, causing lower-leg strain on longer runs and undermining suitability for slower marathoners. At $230 the shoe's tech and aesthetics feel appropriate, but that rigidity — plus minor wet-surface slip and a sharp tongue edge — keeps Whitcomb from fully recommending it for 4+ hour marathoners despite enjoying it for tempos and shorter long runs.

Kelsey Borovinsky from The Quality Edit highlights the On Cloudboom Max as a well-crafted, approachable marathon shoe that favors comfort and stability over radical race-day explosiveness. She praises On’s CloudTec Phase and Helion superfoam for providing structured cushioning, secure heel padding, and a smooth trainer-to-toe-off feel that suits everyday marathoners rather than elite racers. Notable positives include breathable uppers, lightweight build, and race-focused details without the harsh stiffness of carbon-plated super shoes; criticisms center on fabric lace loops that complicate fit and a muted forefoot “pop” compared with the most aggressive speed models. The reviewer tested them in marathon training and finds them a sensible, stylish option for runners seeking a reliable race shoe that prioritizes comfort and broader usability over top-end podium performance.