I ran 45 miles in the On Cloudboom Strike 2, and it’s a balanced racing shoe well-suited to marathons

The best carbon plate running shoes all share the same purpose: to help you run more efficiently at high speeds, but they don’t all do this in the same way.

I love ludicrously light and aggressive super-shoes myself, like the Puma Fast-R Nitro Elite 3 and Asics Metaspeed Sky Tokyo. Still, they’re not the most durable or practical option for anything other than race day, and many runners find them too unstable and uncomfortable for longer events too.

The On Cloudboom Strike 2 is a super-shoe that offers more comfort and stability than its rivals, and even if it’s not the lightest and fastest racer I’ve tested, it still performed well for me across a variety of hard training runs.

It won’t be the perfect racing option for runners seeking the absolute fastest shoe they can strap on, but the balanced ride of the On Cloudboom Strike 2 might hit the spot for marathoners looking for a more controlled ride that’s still fast enough to chase PRs.

On Cloudboom Strike 2 review: Price and availability

The Cloudboom Strike 2 launched in July 2026 and costs $250 in the U.S. and £230 in the U.K., which actually makes it one of the more affordable super-shoes on the market, though you can get cheaper options by shopping for older models in sales.

It’s one of two new On racers, sitting beneath the On Cloudboom Strike 2 LS in the brand’s line-up. The LS version has a one-piece LightSpray upper that makes the shoe considerably lighter, but it’s also considerably more expensive at $310/£300.

On Cloudboom Strike 2 review: Design and fit

The On Cloudboom Strike 2 is currently available in three colors, with bright green and purple designs joining the white and yellow model I tested in the lineup.

I found that the shoe fit me well in my normal running shoe size. It’s a bit tighter around the toes than other On shoes, but you would expect that in a racing shoe. The traditional upper is not as light as On’s LightSpray material, but does allow you to adjust the fit, and some people find the brand’s LightSpray shoes difficult to get on.

My US men’s size 9.5 Cloudboom Strike 2 weighs 7.2oz, and judging by On’s stats, the LS model would be 1-1.5oz lighter than this. The standard shoe is certainly pretty light, but many top carbon racers are under 6oz.

The shoe has a 5mm drop and stack height of 39.5mm at the heel and 34.5mm at the forefoot to match World Athletics regulations, which limit racing shoe stacks to a maximum of 40mm.

Upper

The Cloudboom Strike 2 has an open-weave upper made from quite a stiff material. It’s breathable and lightweight, and I had no problems with comfort during my testing of the shoe.

I’m a fan of On’s LightSpray uppers, which I’ve tested on the original On Cloudboom Strike LS and On Cloudmonster 3 Hyper LS, but they don’t fit every foot perfectly, so the more adjustable design of the standard Cloudboom Strike 2 will create a better fit for some.

Midsole

The Cloudboom Strike 2 has a dual-density midsole that uses two layers of the brand’s springy PEBA-based Helion HF foam that sandwich a curved carbon plate (called a Speedboard here).

That’s all quite standard for a racing shoe, but what is novel about the Cloudboom Strike 2 is the CloudTec Sphere geometry, where channels have been cut into the midsole to increase the rebound you get from the foam.

There’s also a large cutout in the middle of the midsole that runs the length of the shoe and shows off the carbon plate from beneath, which helps to reduce weight.

Outsole

It’s rare to see a lot of rubber on the bottom of a racing shoe, with most brands opting for minimal patches in the heel and forefoot to reduce weight, so it’s a pleasant surprise to see the fuller outsole coverage you get on the Cloudboom Strike 2.

This does add a bit of weight but will improve the durability if you’re using it for a lot of training alongside racing, and the Cloudboom Strike 2 has also gripped well for me throughout testing.

On Cloudboom Strike 2 review: Running performance

I’ve run 45 miles in the On Cloudboom Strike 2 so far, doing a series of workouts in the shoe on the track and road, as well as some light trails. Those workouts have included short, all-out reps and longer stints at my half marathon and marathon race paces.

Most of my runs in the shoe have been fast, since it’s a racing shoe first and foremost, but I also did an easy-to-steady progression run to see how it feels at slower paces.

The ride is more subtle than with many carbon shoes that have very soft, springy foams or highly rockered midsole shapes. The Cloudboom Strike 2 does have a bouncy feel, but it isn’t exaggerated, so it feels a little more natural to run in.

It’s certainly quick, too, and makes holding fast paces feel smooth and controlled. I did a series of 2km reps in the shoe at around 5:15/mile pace and 60-second reps at sub-5/mile pace, and it turns over quickly and gives the added "pop" off the toes you expect from a super-shoe.

That said, it doesn’t feel quite as fast as my favorite super-shoes, which are lighter and more explosive. The Cloudboom Strike 2 is more balanced and feels better than those shoes at slower paces, but for all-out performance I’d opt for something like the Puma Fast-R 3 myself, and I look forward to testing the lighter Cloudboom Strike 2 LS.

However, the more stable, natural feel of the Cloudboom Strike 2, coupled with its extensive outsole, means that it’s a shoe that I’d be happy to use for lots of training as well as racing. I even found it a good option for fast runs on light trails because it’s not as soft and wildly rockered as some rivals.

Should you buy the On Cloudboom Strike 2?

If you just want the fastest super-shoe on the market, I don’t think it’s the On Cloudboom Strike 2. The Puma Fast-R 3 and Asics Metaspeed Sky Tokyo top my list, or the Mizuno Hyperwarp Pure if you’re looking for a short-distance speedster in particular.

I also think the LS version of the shoe will be a speedier option thanks to its lighter upper, even if the midsole and outsole are the same as on the standard Cloudboom Strike 2.

However, if you need a bit more stability and comfort in your racer, and prefer a more natural ride, the Cloudboom Strike 2 is a strong option, alongside the Puma Deviate Nitro Elite 4.

Both shoes are good options for regularly fast training as well as race day, and are at the more affordable end of the super-shoe spectrum, with the On being more comfortable and bouncy, while the Puma is lighter.

The carbon plate shoe market is crowded, but I do think the Cloudboom Strike 2 fits a profile some runners will be looking for, especially for longer events like marathons.