• Terrain


    Shoes best for road, track and light gravel. See the best road shoes.


    Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

    Good to know

    As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

  • Arch support

    Neutral / cushion / high arch

    Shoes for runners who do not need any additional arch support (Around 50% of runners). Best for people with normal, high or medium high arches. See the best neutral shoes.

    Stability / overpronation / normal arch

    Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

    Motion control / severe overpronation / flat feet

    Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

    Good to know

    - Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
    - More about arch support in this video.
    - Find your arch type by following steps from this video.

  • Use

    Daily running

    Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


    Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

    Good to know

    If you want just one pair of shoes, buy a shoe for daily running.

  • Price
  • Weight
    Men: 5.6oz
    Women: 5.6oz
  • Heel to toe drop
    Men: 8mm
    Women: 8mm

    The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

    There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

  • Heel height
    Men: 17mm
    Women: 17mm
  • Forefoot height
    Men: 9mm
    Women: 9mm
  • Width
    Men: Narrow, Standard
    Women: Narrow, Standard
  • Release date
    Mar 2018
Show more facts


Expert Reviews

Experts are runners, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

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85 / 100 based on 13 expert reviews

  • 86 / 100 | Stephen Clevenger

    Adidas Adizero Sub2: An improvement to the Adios line

    Adidas recently introduced their newest marathon racing flat, the Adizero Sub2, after their popular Adizero Adios Boost line was overtaken in the marathon game by the Nike Vaporfly 4%.

    The Sub2 is impressively light, breathable, responsive and fast. As Adidas has made a staple of, in their partnership with Goodyear, the shoe also has incredible traction.

    The weight Adidas cut when comparing the Adios line to the Sub2 made the shoe firmer and more responsive, with a very “close to the ground feel.” However, the lack of cushioning in the forefoot makes the shoe a great 5k to half marathon option but only will be a marathon shoe for a select audience.



    The upper of the Sub 2 is very light and breathable. In fact, you can see right through most of the shoe (notice this in the pictures).

    The upper lacing system provides a secure feeling even with the obvious reduced material used in forming the upper. The upper is also very flexible in the toe box, something that the Adidas Adios line did not provide.



    Adidas has implemented a fully lined Boost midsole in the Sub2. The Boost material was previously only partially used in the heel of the Adios midsole.

    The improvement is more responsiveness in your run, which the Boost material has become known for. However, the Boost material used in the forefoot does seem to make the forefoot area quite a bit firmer.

    The Sub2 produces an audible slapping noise when the foot strikes the ground. I’ve run next to others wearing the Sub2 and noticed it sounds quite different from them as well.



    The Sub2 outsole is all one piece with a smooth heel to toe transition reminiscent of the New Balance Fresh Foam Zante. The one-piece outsold offers a smooth midfoot and even heel-strike landing zone.

    The Goodyear traction offers the best traction and connection to the ground feeling of any racing flat or shoe that I have tried. If running in damp or wet conditions the reassurance of this technology is second to none.



    The Boost material throughout the sole gives the Sub2 a pop that the adios doesn’t quite have. However, the Sub 2 is quite firm in the forefoot and does not offer much cushion.

    In this respect, it would be tough to recommend this shoe as a marathon shoe for many.

    Based on your foot-strike and cushioning needs in a marathon it could be a great option, I would think many will need more cushioning.


    The Sub2 shoe is firm, fast and responsive. I’ll be wearing it in anything shorter than a marathon.

    However, in the marathon, striking the balance between weight and cushioning, the Sub2 is just a little too light and not quite enough shoe to take me there.

    This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.

  • 95 / 100 | Greens Groenewald

    Taking the Adidas Adizero Sub 2 for a spin

    The Adidas Sub 2 has been unleashed in the athletic quest to break the magic two-hour barrier in Marathons, so I had high hopes for this racer. And it didn’t disappoint.



    Classification Racing flat (Neutral)
    Heel to toe drop 8 mm
    Stack height 21 mm
    Size Unisex
    Sockliner 3,5 mm (glued, non-removable)
    Price R1600

    First impressions (that last)

    It has a light and easy feeling on the foot, with a great, highly supportive fit with no pressure points. Other notable specs include the firmer feel of Boost Light technology as compared to Ultra Boost or the Energy Boost midsoles.

    The result is an easy fitting, light and breathable shoe that doesn’t squeeze the feet to pain as many race flats do. The rubber felt adequate, the heel cup moderately firm and the heel cuff is also lower than the most Adidas shoes.


    A light and airy dual density mesh cover the entire upper with only one supportive overlay on the medial side of the midfoot. The Microfit upper is made of a single layer of thin small holed soft mesh that makes the shoe very breathable.

    The mesh is woven slightly denser on the inside to create vertical bands of support. The fit is snug and on the narrower side which is common for faster shoes.



    With the midsole, they used a different kind of boost. It’s firmer, much lighter and feels like it has less lateral deflection. With this new PEBA-based Boost compound, it feels firmer but with a good vibration dampening.



    It has a single continuous slab of Continental micro web outsole. The full length and full ground sole provide great durability and traction.

    The shoe has very good flexibility, as it allows for a more natural transition when running. The Sub 2 has an ample surface area that should accommodate all types of foot strikes.



    • Lightweight
    • Durable (continental outsole)
    • Smooth transition
    • Breathable
    • Flexible
    • Supportive


    • Toe box a bit narrow
    • Color and design plain (if you’re used to flashy colors)
    • Non-removable sock liner

    Bottom line

    I’m a huge fan of the Adidas Adizero Sub 2 racing shoe. I’m a heavy (88kg) runner and this lightweight shoe is even comfortable for me and not just the lightweight elite runner. The Sub 2 takes the conventional race flat to a new level of refinement, incredibly light, comfort and with state of art materials and elegant thoughtful design.

    This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.

  • 90 / 100 | Hes Kicks

    If you want a lightweight shoe that has some impact protect and is just a really light ride, this shoe is pretty incredible...

  • 89 / 100 | Gazelle Sports

    While the shoe may not look super aesthetically pleasing to some, the feel is definitely where it makes up a lot of that ground.

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Updates to Adidas Adizero Sub 2

  • The Adidas Adizero Sub 2 is a running shoe that’s designed for those who want to take on long races and extended running sessions. Marathoners and competition enthusiasts are the target audience of this product. It makes use of a lightweight and uncluttered design to adequately accommodate the movement capacity of the foot. A mesh exterior and a set of underlays offer a secure yet breathable coverage.
  • Underfoot cushioning is provided by a full-length compound. Its job is to carry the foot and keep it comfortable throughout the running session. Its thin profile also accommodates the natural bending capacity of the muscles and joints of the foot. The Microweb outsole covers the rest of the sole unit, protecting it from wear and tear.

Adidas Adizero Sub 2 size and fit

The Adidas Adizero Sub 2 was designed using the standard measurements, so it is recommended to get the usual size to achieve a pleasant in-shoe experience. When it comes to width, the option is D – Medium. It is advertised as a unisex shoe, but the dimensions were geared towards men.

The semi-curved shape of the last and the form-fitting upper mimic the natural curvature of the human foot.


The outsole unit of the Adidas Adizero Sub 2 makes use of the Continental™ Microweb, which is a full-length rubber layer that covers the entire midsole unit. It shields the cushioning foam from wear and tear. It is also responsible for traction over surfaces that are both dry and wet.

Shallow flex grooves allow the platform to bend in conjunction with the joints and muscles of the wearer’s foot. These mild indentations help in bettering the toe-off phase of the gait cycle.


A lightweight version of the boost™ cushioning platform is used in the Adidas Adizero Sub 2. This full-length foam is made up of thousands of thermoplastic polyurethane pellets that have been fused together. Its job is to deliver a responsive ride. The Pure Boost is another Adidas running shoe that is known for the signature boost™ midsole material.


The Advanced Mesh is a lightweight cover system that offers a breathable wrap. It has breathing holes all over its façade to permit airflow into the foot-chamber. It has internal support layers to bolster its structural integrity and to keep the foot secure.

The Microfit lockdown system is composed of thin overlays and stitched reinforcements. These elements work together to maintain a snug coverage.

A traditional lacing system is employed in the Adidas Adizero Sub 2. It uses semi-round shoelaces, sewn-in reinforcements on the eyelets, and a fabric anchor on the tongue. These components are responsible for tightening and loosening the fit. Extra apertures are placed near the tip of the collar to lock the heel in place.