Adidas Adizero Adios Prime X: A Cold Weather Long Run Review

Introduction

Most cold-weather running shoe talk centers on whether premium racing foams lose their spring when the temperature drops. After a 16.29-mile workout averaging around 7:26 per mile pace, including three times three miles at marathon effort with one-mile floats, the Adidas Adizero Adios Prime X came out of a 16°F session looking very good. This pair was self-purchased with no manufacturer involvement, so the impressions here are entirely from regular training use.

The short version: cold weather barely changed the experience, the shoe remained excellent for long marathon-pace work, and the main caveats have nothing to do with the temperature at all.

Who This Product Is For

The Prime X is best understood not as a traditional super shoe but as a super workout shoe. It suits runners putting in high mileage weeks with marathon-pace or threshold-pace sessions, who want the benefits of a carbon-plated racing shoe with even more cushioning and less toll on the body. If your goal is to do more quality work, recover faster, and build consistently week over week, this shoe fits that role well.

First Impressions and Specs

This is a maximalist racing shoe on two levels. First, the stack height: 50 millimeters in the heel with a 10-millimeter drop, giving 40 millimeters in the forefoot. That 40-millimeter forefoot figure sits exactly at the World Athletics maximum allowed stack height, which is why the shoe is often described as outside the rules. Second, the carbon: there is a half-length carbon fiber plate running backward from the forefoot to stabilize the heel, plus metatarsal rods in the same plane that behave like a plate, and then three additional carbon fiber blades under the metatarsal area. That makes two planes of carbon where the rules allow one.

The foam throughout is Lightstrike Pro, Adidas’s most premium racing foam. For everyday runners, none of the rule issues actually matter. You can race a marathon in these if you want, and nothing prohibits it at a recreational level.

Main Strengths

The standout quality is how easy the shoe is on the body over long distances. It delivers a feel similar to a carbon-plated super shoe, but with extra cushioning that makes it gentler on the joints. That makes it a natural choice for long runs and workout days where you would otherwise reach for a plated racer.

On the cold-weather front, the results were surprising in a good way. At 16°F, there was little meaningful difference compared with warmer conditions. Any slight loss of spring felt minor, and honestly it was hard to separate how much of that was the foam reacting to the cold versus simply colder, less sensitive feet. It remained a fun, fantastic option for long runs with marathon pace or faster moderate-to-threshold work.

The see-through upper also proved less of a cold-weather liability than expected. It is not a dedicated winter running shoe, but breathability was not a problem on a cold morning as long as footing was clear.

Things to Consider Before Buying

The bigger issue is stability, not temperature. With this much stack, the shoe is genuinely unstable. On straight runs over flat terrain you likely will not notice it, but on routes with lots of turns or varied terrain it becomes obvious. Even taking ordinary corners, it helps to slow slightly to keep the ankle stable, or things can slide around a bit. The celery-mesh-style upper holds the foot well, but it can only do so much with a stack this tall.

Second, pace profile matters. At easy to marathon effort the shoe shines, but at stride-level, very fast turnover efforts it starts to feel mushy and sluggish. It is not the shoe to reach for if the day’s work is short and sharp, like racing a mile.

Buying Advice

Buy this shoe as a training tool, not a race-day weapon. If your training block is built around long runs and extended marathon-effort blocks, the Prime X lets you accumulate more quality work with less body cost, so you can show up fresher to the next session. On cold days it holds up well: any winter route you would happily run in this shoe during summer remains fair game as long as the path is clear, not icy, and predictable.

Skip it or use it carefully if your routes involve lots of tight turns, uneven surfaces, or if you mainly need a snappy short-distance racer. At stride pace, the fast turnover simply is not there, regardless of temperature.

Conclusion

The Adidas Adizero Adios Prime X is a quirky shoe, but it is a lot of fun, and it leaves you feeling good both during and after long, hard sessions. Cold weather turned out to be a non-issue: the foam held up at 16°F, the upper was not uncomfortably breathable, and the shoe remained exactly what it was in warmer conditions. For high-mileage runners who want maximum cushioning and a plate-like ride for their hardest training days, it is easy to recommend, with the caveats that it is unstable on turns and not built for very fast turnover.