Best Super Max Stack Running Shoes: The Top Picks of the Year

Introduction

Every year has a theme, and the standout theme of the season has been the rise of super max stack running shoes: trainers and racers with more than 40 mm of foam in the heel, the height at which World Athletics deems a shoe illegal for record-keeping competition. For everyday runners, that rule does not matter, and that is exactly why the category has exploded. These shoes are towering, protective, and often built with race-level foam that makes high mileage feel easier.

Below is our ranked breakdown of the eight shoes that defined the category, from an out-of-production favorite worth hunting down to the one shoe that simply had the most fun in it.

What Makes a Super Max Stack Shoe?

The definition is simple: anything with a heel stack above 40 mm lands in this territory, with the most extreme examples measuring 44 to 50 mm. The category grew out of marathon racing shoes that were amped up past the legal limit for elite competition. There is no fine line between max stack and super max stack, but once a shoe clears that threshold, the riding experience changes noticeably.

Most of these shoes carry plates or rods, not for propulsion but to stabilize a tall stack of foam. They also tend to use more exciting midsole compounds than standard trainers. Nearly every shoe on this list contains a race foam or something very close to one.

Why Run in a Super Max Stack Shoe?

The main benefit is protection. High-mileage runners consistently report that max cushion and super max stack shoes make it easier to absorb big weekly totals and take the brunt of the pounding. Anecdotally, they also tend to suit bigger runners better: more force going into the shoe means more foam matters, and tall stacks stand up better to body weight, time on feet, and pace.

One caveat: every shoe works different muscles and applies different stress to the body. Rotating in a lower-stack, more traditional trainer alongside these is a sensible way to keep your running balanced.

Honorable Mentions: Adidas Prime X Strung OG and Hoka Mach X2

The Adidas Prime X Strung OG may be the best long run shoe of its era, with a stamped 50 mm stack of foam delivering enormous cushion and bounce. It only misses the core list because it is no longer being made, which makes it a clearance-hunt proposition. It is on the narrower side and not the most stable, but as a pure cushioned cruiser it remains an absolute standout. If the eventual sequel keeps this formula, it could top a future list.

The Hoka Mach X2 measures around 44 mm in the heel, technically clearing the super max bar, but it lacks the amped-up spirit of the category. It feels like a more robust, streamlined speed trainer: bouncy and fun, but closer to a slightly better version of a traditional tempo shoe. It is still one of the favorite marathon training shoes of the year, and for treadmill sessions, the Mach X2 or the SuperBlast 2 are the smartest picks from this group, since the extra bounce of softer super stack shoes can feel odd on a gym belt.

Number 5 (Tie): Asics SuperBlast 2 and Asics Glideride Max

These two share a spot because they are two variants of a similar idea. The Asics SuperBlast 2 is the stability and structure pick: firm, never bottoming out, with decent bounce that feels livelier the heavier you are. Runners who find it too firm can swap in a softer aftermarket insole to make the ride noticeably more tolerable. It is the firm-shoe pick of the tie.

The Asics Glideride Max is the soft pick, measuring around 45 to 46 mm in the heel, which is simply absurd in the best way. It is soft, bouncy, comfortable, and fun, the utmost in comfort, though its tall squishy platform can potentially bottom out. In short: if you like firm, take the SuperBlast 2; if you like soft, take the Glideride Max. Both are excellent long run shoes, with the SuperBlast 2 suiting lighter runners and the Glideride Max suiting heavier ones.

View more details for Asics Superblast 2

Number 4: Adidas Prime X Strung 2

The Prime X Strung 2 packs 50 mm of stack with Lightstrike Pro race foam and a two-plate setup, which makes it firmer than its predecessor. The trade-off is weight: it is roughly 50 grams heavier than the OG, and it can feel heavy and awkward to turn over in, especially early in a run. But once the foam gets going, it is hard to stop. It legitimately delivers a noticeable pace assist over long distances, making long tempo efforts feel far easier than they should.

It is not the most fun shoe here, but the performance is undeniable. If you are targeting a marathon at 3:30 or slower, this is one of the most effective ways to make those paces feel manageable.

Number 3: Brooks Glycerin Max

The Brooks Glycerin Max exemplifies what the category is about when comfort is the only goal. It is a non-plated super max stack shoe built on a dual-density DNA Tuned midsole, softer in the heel, firmer up front. If you loved the New Balance 1080 v13, the Saucony Triumph, the Asics Nimbus, or the Nike Invincible and wished they were even more protective and plush, this is that wish granted: comfort dialed to the absolute maximum, with generous padding in the upper and excellent grip.

Brooks deliberately made this a recovery-day cruiser rather than a do-everything shoe. Running marathon pace in it, even at 10-minute paces, is not what it is built for. At around $200, it is a serious investment, but for easy miles, walking around, and all-day comfort, it is arguably worth every dollar.

Number 2: Puma MagMax X

If the Glycerin Max is comfort amped up, the Puma MagMax X is the workhorse amped up. It packs a thick stack of last-generation race foam with no plate and no secondary foam, delivering bounce, protection, and reliability in one package. Runners who use the SuperBlast 2 as an everyday trainer may find the MagMax X even better for that job: bouncier, more comfortable, and more protective, with excellent grip.

It feels heavy on foot until you get it rolling, but once it is moving it cruises through long runs with ease, including multi-hour efforts. If you have liked standard daily trainers such as the Pegasus, Vomero, or Triumph and wished the experience were more fun over long miles, this is exactly that. It sits in the middle of the softness continuum between the Glycerin Max and the Skyward X.

Number 1: Hoka Skyward X

The Skyward X takes the top spot because it has the most fun in it. The construction is a top layer of race foam, a carbon fiber plate in the middle, and a bottom layer of supercritical EVA training foam, and the balance of that stack is outstanding. It is the same weight class as the Glycerin Max and MagMax X, yet it delivers a special quality: the feeling that the shoe is doing some of the lifting for you, helping you dig deep when a run gets hard. It is hard to recall a bad run in it.

The caveats are real, though. This is a shoe for bigger or more powerful runners. If you are very light on your feet, dislike lots of foam, or prefer firmer-traditional platforms you may find it too firm or hard to activate; if you want something soft, the Glycerin Max is the better call. But if you want the purest expression of what the illegal category is supposed to be about, fun, comfort, and making running feel easy, this is it.

Buying Advice

You do not need one of these shoes to train. Super max stack shoes are the cherry on top of a training plan, and a great source of extra motivation during marathon blocks or tough stretches of winter running. A few practical pointers:

• Recovery and easy days: Brooks Glycerin Max, without question.
• Everyday training workhorse: Puma MagMax X.
• Firm and structured long runs: Asics SuperBlast 2; soft and plush long runs: Asics Glideride Max.
• Marathon pace practice at slower goal times: Adidas Prime X Strung 2.
• Pure enjoyment and motivation: Hoka Skyward X.
• Treadmill sessions: Hoka Mach X2 or Asics SuperBlast 2, since they feel the most normal of this group.

If you are a bigger runner, lean toward the more protective options like the MagMax X or Skyward X. If you rotate shoes, keep a lower-stack traditional trainer in the mix to balance the load on your body.

Conclusion

The super max stack category is one of the most exciting developments in running footwear in years. Whether you chase the balanced fun of the Skyward X, the plush comfort of the Glycerin Max, or the workhorse reliability of the MagMax X, there is a towering shoe here that matches your training. Pick the one that fits your runs, not just your wishlist, and enjoy the extra protection on every mile.