Verdict from 1 expert and +100 user reviews

6 reasons to buy

  • Many people felt that the Adidas Speedfactory AM4LDN was suitably lightweight.
  • The color scheme of this running shoe was deemed to be very eye-catching.
  • Several consumers felt that the performance-centric design allowed confident running sessions.
  • Some people claimed that this product was more comfortable than the Ultraboost series.
  • Most of those who have tested the Speedfactory AM4LDN felt that the sizes conformed to their expectations.
  • Casual walking is an activity that agrees with this shoe, according to some consumers.

3 reasons not to buy

  • Some purchasers felt that the upper was tight and not stretchy.
  • The insole tended to slide towards the front section, a person complained.
  • Based on a handful of reviews, the fit profile of the Speedfactory AM4LDN was slightly narrow.

Bottom line

The Adidas Speedfactory AM4LDN was able to gain mostly positive reviews from its testers. This neutral running shoe was appreciated because it had an appealing color scheme, a lightweight build, and versatile construction. On the other hand, some users didn’t like this road companion’s seemingly narrow profile, the restrictive upper, and the sliding sock liner.

Tip: see the best running shoes.

Good to know

  • The Speedfactory AM4LDN is an Adidas running shoe that’s made using the inputs of runners from London. The ideas gathered from the people are combined, and the result of that collaboration is the product that comes out of the Speedfactory facility in Germany, an Adidas workshop that’s responsible for making the final product.
  • A knitted textile is used for the upper unit of this athletic apparel. It doesn’t have a tongue unit; instead, it features a one-piece design to deliver a seamless and irritation-free coverage. Discreet eyelets maintain the smooth scheme of the façade, and they’re supported by thin and assistive overlays.
  • The ever-famous boost™ foam runs the full length of the Adidas Speedfactory AM4LDN. It is responsible for providing a springy underfoot experience. A floating Torsion bar supports the underfoot and keeps the ride steady.

The Adidas Speedfactory AM4LDN has a standard running shoe length. It allows the runner to get a pair in their regular size. The width profile of this model is medium. It’s designed to fit the foot-dimensions of men.

A rubber compound serves as the outsole layer of the Adidas Speedfactory AM4LDN. It has a flexible nature. It also has a stretch-web design, which means that it resembles a grid, with focused nodes, connecting strands, and grooves. Traction, abrasion protection, and freedom of motion are the hallmarks of this structure.

Just like the popular Adidas Ultra Boost Uncaged, the midsole unit of the Speedfactory AM4LDN makes use of the Boost™ foam. This compound is made of TPU pellets that have been molded together to create a single platform. Its purpose is to cushion the foot, attenuate impact shock, and provide an energized toe-off.

A sock liner is placed above the main cushioning material. It adds a bit more support for the underfoot. It can be removed or replaced with a custom insert of the wearer’s choosing.

A knitted textile makes up the external part of the Adidas Speedfactory AM4LDN’s upper. It offers a form-fitting fit that doesn’t restrict movement.

A one-piece design removes the traditional shoe-structure of having a separate tongue unit. The instep and the rest of the cover system are of one layout, thus aiming for a consistent and coherent foot-wrap.

There is a traditional lacing system, but it’s inconspicuous in form and placement. The laces are thin, and they don’t intrude the one-piece look of the façade. Slits on the textile upper make up the eyelets, but they’re bolstered by synthetic overlays that extend to the lower midfoot and heel.

An external heel counter made of stretched textile holds the rear of the foot and prevents it from wobbling or exiting the foot-chamber accidentally.

The interior chamber is padded, and the sleeve is made of a smooth textile. Both these elements help in hugging the foot and keeping it safe from irritation.

Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.