Tech Specs
At A Glance
Geometry
WEIGHTUnisex US 9 190g LS 158g
STACK & PITCH39.5/34.5mm
MIDSOLEPeba
Fit & Use
TECHCloudTec Sphere, Helion HF, Lightspray option
FITGood width, Order normal size
BEST USEMarathon Road Racing
Market
PRICE—
LAUNCH30.7.26
COMPETITIONAsics Metaspeed Ray
First Look
The latest evolution of ON’s premier marathon-race-day shoe has hit the market. The masses well loved the Strike for its highly responsive feel and stability, something that has proved difficult to master in unison. ON has been bold with this update and spent a relatively long time developing the 2. They have tried and tested several prototypes to find their most efficient model to date. The 2 is designed and engineered for the marathon demands but will happily succeed across some distances on the road.
Compared to its predecessor, the shoe appears cleaner and more functional at first glance. The revamped midsole, which features On's new CloudTec SphereTM geometry, is the most noticeable visual alteration. The Strike 2 has developed cushioning channels that offer a better ride while preserving the brand's unique identity, in contrast to the big, open pods typically associated with On running shoes.
On isn't reinventing its marathon racer with the Cloudboom Strike 2—it's refining it. And judging by the early specifications and athlete feedback, those refinements could make a meaningful difference on race day.
Compared to its predecessor, the shoe appears cleaner and more functional at first glance. The revamped midsole, which features On's new CloudTec SphereTM geometry, is the most noticeable visual alteration. The Strike 2 has developed cushioning channels that offer a better ride while preserving the brand's unique identity, in contrast to the big, open pods typically associated with On running shoes.
On isn't reinventing its marathon racer with the Cloudboom Strike 2—it's refining it. And judging by the early specifications and athlete feedback, those refinements could make a meaningful difference on race day.
The Fit
The Cloudboom Strike 2 delivers a true-to-size fit with a race-oriented silhouette. The engineered mesh upper wraps the foot securely without feeling restrictive, striking a nice balance between lockdown and comfort. There's enough room through the toe box for natural toe splay, while the midfoot remains snug and confidence-inspiring when cornering or picking up the pace. The heel collar is minimal but effective, providing a secure hold with no noticeable heel lift during faster efforts.
The Feel
Step-in comfort is surprisingly plush for such a lightweight racing shoe. The new Helion™ HF midsole feels softer than previous On racing models without sacrificing responsiveness. Underfoot, there's an immediate sense of rebound that encourages you onto your forefoot, while the carbon Speedboard delivers a smooth, propulsive transition from heel to toe. Unlike some supershoes that can feel unstable at slower paces, the Strike 2 maintains a composed and predictable ride, making it feel approachable for a wider range of runners.
Function
Everything about the Cloudboom Strike 2 is designed with racing efficiency in mind. The lightweight construction disappears on foot, allowing the foam and carbon plate to do the work without feeling intrusive. The rocker geometry promotes quick turnover, while the updated CloudTec Sphere design smooths out landings and keeps transitions fluid throughout the gait cycle. Whether tackling interval sessions, half marathons, or the full marathon, the shoe feels engineered to reward efficient running mechanics and sustained fast pacing rather than simply relying on extreme softness.
The Verdict
Summary
The ON Cloudboom Strike 2 represents a mature shift in ON’s approach to the super-shoe category. By moving away from massive, open-cavity pods and leaning into the refined CloudTec Sphere geometry paired with the highly responsive Helion HF foam, they have delivered a racer that balances aggressive propulsion with predictable stability. For runners looking for a lightweight, race-day weapon that rewards good mechanics and handles high-tempo cornering with absolute confidence, the Cloudboom Strike 2 is a formidable contender for your next personal best.
The Authors
