On Cloud Boom Strike 2 Review: A Comfortable Carbon Racer That Struggles to Feel Fast

Introduction

The On Cloud Boom Strike 2 arrived with a lot of expectations. The original Cloud Boom Strike was one of the most distinctive super shoes of its generation: bouncy, quirky, and full of character, right down to its pull-out insole. The sequel keeps that insole and adds a new CloudTec Sphere in the forefoot, a cutout design that On positions as the next big thing in energy return.

After two solid tests, a workout with 3x1 mile hard repeats and a 20-mile long run at 2 hours 29 minutes, the picture is clear. This is an exceptionally comfortable shoe that simply does not deliver the speed its race-day build promises.

Who This Shoe Is For

The Cloud Boom Strike 2 is best suited to runners who prioritize comfort above all else in a plated shoe. The CloudTec Sphere in the forefoot is super soft, the heel section sits slightly firmer, and the overall ride feels like something you could happily spend two and a half hours in. If you judge shoes by how your feet feel the next morning, this one will likely leave you feeling fresh.

It fits true to size in a 10.5, with the toe sitting right at the front of the shoe, perhaps a touch longer than some other models in the same size. The upper is comfortable with good padding around the heel collar and no lace bite, though it uses a somewhat starchy, less premium material than the lighter-spray upper found elsewhere in On’s lineup.

Main Strengths

The comfort is the headline. The forefoot CloudTec Sphere absorbs impact generously, the geometry feels stable and pleasant at easy paces, and the shoe works beautifully as what is essentially a max-cushion recovery tool. On a six-mile recovery run at a relaxed pace, this would be an absolutely beautiful ride.

The build quality is also genuinely there. The foam’s texture and breaking lines closely resemble the Adizero Adios Pro family’s foam, the carbon fiber plate is visible and positioned close to the foot before scooping down toward the forefoot, and the pull-out insole from the original model carries over.

The core thesis is simple: there is literally nothing wrong with this shoe as a comfortable, easy-paced ride. It is a fine, pleasant experience for the majority of runners who will never push it near race pace.

Things to Consider Before Buying

This is where the review turns sharply. For a shoe with 100% race foam, a carbon fiber plate, and a $250 price tag, it does not feel fast, and that is close to a kiss of death in this category.

The core problem is the mush. The bottom foam has been made significantly softer than the original, and pressing into it with a finger shows the difference immediately: the foam stays depressed rather than snapping back. There is no bounce, no snap off the forefoot, and no rocker-driven roll. The geometry, despite its curved look, feels flat underfoot.

The CloudTec Sphere itself underdelivers. Unlike a pressurized air-based forefoot unit, which has a hard container that rapidly returns the energy you put in, this is regular foam with cutouts. It compresses down and out but lacks the internal pressure to propel you back up. The result feels disjointed on landings and, if anything, makes the ride mushier.

Practical fit issues add up too. On the right side, there was noticeable heel slip inside the exposed-foam interior, enough to feel unstable going around corners even though the shoe itself is stable. The ride was also consistently slower than comparable racers, with pickups landing 10 to 20 seconds per mile off expected pace despite feeling fresh.

Buying Advice

If you want a genuinely fast plated shoe, there are stronger alternatives in the same conversation. The Hoka Cielo X1 3.0 blends a great rocker, real protection, and legitimate speed into a rare comfort-plus-speed package. The New Balance SC Elite V5 delivers classic snap off the forefoot with soft-but-not-mushy cushioning and broad appeal. And the Saucony Endorphin Elite 3 is the pick for runners chasing that soft, bouncy energy return you can access even at slower paces.

If your priorities are different, the calculation changes. A 4-hour marathoner, or anyone choosing race shoes purely on next-day foot comfort rather than speed, will very likely enjoy this shoe. It is not a bad product. It is a comfortable recovery-style ride wearing a race shoe’s price tag, and the honest question is whether that is what $250 should buy you.

Conclusion

The On Cloud Boom Strike 2 is a shoe of two identities: a genuinely pleasant, cushioned cruiser and a race shoe that sucks the energy out of every hard effort. The soft forefoot, comfortable upper, and stable geometry make it easy to live with, but the absent bounce, flat geometry, gimmicky forefoot cutouts, and heel slip undermine its core purpose. Fast runners should look elsewhere; comfort-first runners may find exactly what they want here.