Adidas Adizero Boston 12 Review: A Redemption Story for the Super Trainer

Introduction

There are shoes that improve quietly, and then there are shoes that come back from the dead. The Adidas Adizero Boston 12 falls firmly into the second category. The Boston 10 and 11 were shoes we simply did not enjoy running in: firm to the point of punishing, slow to break in, and rigid enough that impact felt like it traveled straight up the leg. The Boston 12 changes that formula in almost every meaningful way.

Adidas positions this shoe for tempo runs and speed work, but it behaves like something more versatile. It belongs to the emerging “super trainer” category: race day ingredients packed into a more durable daily trainer. And this time, the ingredients actually work together.

A redemption for the Boston line

The story here is simple: the Boston 12 fixes the complaints that made the 10 and 11 hard to recommend. The previous versions felt like blocks underfoot, and the shoe took decades of miles to soften up. The 12 delivers a softer, more flexible, and much more pleasant ride while keeping the snappy character the line is supposed to be known for.

It is worth noting upfront that the upper is the weak link. There are real fit quirks to work through, and some runners may need to experiment with sizing and lacing. But the midsole more than compensates, and after the fit is dialed in, this becomes one of the more enjoyable daily trainers available.

Upper and fit

The upper is an engineered mesh that is light and breathable, with no rubbing or hot spots. The tongue is very thin and not gusseted, but internal support panels on the lateral and medial sides rise up and loop into the laces, wrapping the foot for a secure lockdown over the top.

That said, the fit has issues. The build is surprisingly wide, with plenty of room, and possibly too much. Runners with narrower feet may find themselves cinching the laces tightly, which can press the energy rods uncomfortably into the bottom of the foot. The heel counter uses unpadded pillows on either side of the Achilles line, a design that rarely works perfectly, and some testers experienced mild heel lift early on before dialing in the lacing.

Overall, the upper is breathable and inoffensive, but the fit quirks make it the weakest part of an otherwise excellent shoe. Some runners may even want to consider going down a half size.

The midsole: where this shoe shines

Beneath the foot, the Boston 12 uses a dual-foam setup. Lightstrike Pro sits directly underfoot for a soft, bouncy feel, and beneath that sits the firmer Lightstrike 2.0. Sandwiched between them are glass fiber energy rods in the same figure-eight configuration as the Adizero Pro 3, though softer than a carbon-infused setup.

The result is genuinely luxurious compared to the Boston 10 and 11. Landing under the forefoot gives a nice give that translates into bounce, and despite the rods, the shoe flexes noticeably, something stiffer plate shoes cannot do. The outsole rubber is also impressively grippy, the kind you can hear holding traction when walking around indoors.

The stack is substantial: 37mm in the heel, 30.5mm in the forefoot, for a 6.5mm drop. That lean keeps the shoe feeling sporty despite the tall platform. The firmer layer beneath the rods also adds a bit of stability in the heel.

Ride and performance

This is not a mushy soft shoe. It still picks up the pace. The energy rods provide a distinct pop that makes tempo efforts feel natural, and the ride retains a snappy, responsive character beneath the cushioning.

It is also respectably light for everything packed into it. A women’s size 7.5 came in at 7.65 ounces, and a men’s sample measured 9.5 ounces (270 grams), which is under 10 ounces for a trainer with this much rubber, midsole, and hardware. That is a solid weight for the category.

Pricing and who it suits

The Adizero Boston 12 launches at $160. That hits the going rate for daily trainers, and it undercuts most true super trainers, which typically start around $180 when they include a plate. That makes it a slightly more affordable entry into the category.

If you race in the Adizero Pro 3, this shoe makes an excellent training companion. Logging long runs and speed work in the Boston 12 gets you accustomed to the Pro 3’s feel, giving you a one-two punch of training shoe and race day shoe. For everyone else, it works simply as a comfortable, durable, slightly sporty daily trainer.

Conclusion

The Adizero Boston 12 is a genuine redemption. The problems that plagued the Boston 10 and 11 have been cleaned up, the midsole is dramatically improved, and the result is one of the more enjoyable shoes in the super trainer space. The upper fit has quirks, but they are workable, and the overall package is strong enough that this earns a clear recommendation for tempo days, daily miles, and everything in between.