Adidas Adizero Adios Boost 2 Review
The Adidas Adios has a new material in the midsole (see 'Adidas Boost Foam' below) which has more spring and lasts longer than conventional foam. However, unlike the Adidas Energy Boost, the Adios is thinner and lacks the immediate comfort of the Energy. The Adios is a traditional design, with the heel raised 11mm above the forefoot, more than the Asics GT 2000, a shoe I consider the epitome of traditional shoe design. The Adios confirms the potential of the Boost foam, if only Adidas could design a descent shoe around it. (I use The Science of Running Shoes as the basis of how I test running shoes and what you should look for in a running shoe.)
Contents
1 Characteristics
- Why you’d buy it. If you can tolerate the 11mm drop, you're a heel striker and you're after a shoe that will last a long time, consider the Adios.
- Cushioning . The Adios has limited cushioning, especially in the forefoot where it's similar to a shoe that I'd consider minimalist. The large drop means that the heel is better cushioned, though still very poor for its weight. The outsole wraps around the inside of the heel, creating a pseudo-medial post. This reduces the cushioning on the inside of the heel and I found it a little uncomfortable. However, the Boost material gives more spring than the equivalent conventional EVA foam.
- Drop. The Adios has an appalling 11mm of drop, which made it hard for me to run in them. Running in high heels tends to move my initial contact point back, so I become a heel striker in these shoes.
- Structure. This shoe uses single density of foam, but there are features that create biomechanical interference. There is the outsole that wraps around the inside edge of the heel and a plastic plate that pushes up under the arch area.
- Flexibility. The thin forefoot gives the Adios good flexibility.
- Outsole. There is a hard rubber covering most of the contact area of the shoe, which improves longevity. There are also hard plastic nodules in the middle of the forefoot that improves grip on asphalt.
- Shape. The Adios doesn't come close to matching the shape of the human foot, so cutting open the toe box is important. (I recommend cutting open the toe box of virtually all running shoes, with the exception of a few shoes like some Altra shoes. When you have some worn out shoes, you should try cutting open the toe box. I've found that it's a big improvement, allowing my toes to move naturally and engage for toe off, as well as reducing the possibility of blisters.)
- Upper. The upper is inflexible and rather thick, with worse breathability than many other shoes. There's no padding in the upper except a little around the ankle opening, but at least the upper is largely seamless.
- Tongue. The Adios has a traditional tongue that is has a tab to attach it to the laces, with a little padding.
- Lacing. The flat laces work well and remained tied.
- Heel Counter. The heel counter is external, but remarkably hard. The Adios is one of the few shoes I've tried where I've found the heel counter slightly uncomfortable.
| This review was made possible by readers like you buying products via my links. I buy all the products I review through normal retail channels, which allows me to create unbiased reviews free from the influence of reciprocity, or the need to keep vendors happy. It also ensures I don't get "reviewer specials" that are better than the retail versions.
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2 Cushioning and Shoes
It's intuitively obvious that the cushioning in a shoe will reduce the impact on your body when running. However, The Science of Running Shoes indicates that the reality is rather more complex. While slight cushioning may reduce the effort needed to run by improving your Running Economy, most scientific research indicates that more cushioning does further improve Running Economy. In addition, cushioning does not generally reduce impact and may actually increase it. This is counterintuitive, but is likely to be due to the way a runners mind and body adapts to softer cushioning. Unfortunately, the scientific evidence is far from complete and it's hard to give clear recommendations. I believe that some runners will prefer more cushioning, while others prefer less, and typically those running further have a fondness for greater cushioning. I also believe that a shoe should be as light as possible, and a shoe should justify its weight with the cushioning it provides. My advice is to decide what level of cushioning you're looking for, and then find the lightest shoes that also fit well and are comfortable.
3 Visualizing the Attributes of the Adidas Adios Boost
4 Adidas Boost Foam
The Adios uses a new type of foam in the sole that has more bounce and is more resilient. Adidas demonstrates this extra bounce by dropping a steel ball on their new foam and EVA, the industry standard foam. Because of the extra energy return in their new foam the ball will bounce much higher than on EVA. However, when we run our feet do not bounce off the ground, but have a short period of sustained contact, often called the 'stance phase'. So when your foot lands, it seems that the boost foam would return the landing shock back up your leg rather than absorbing it, which is less than ideal. It would be good to see a study that looks at how the boost foam changes the stresses on knees and hips compared with a standard running shoe. Regardless of how the bounce impacts your running, the increased lifespan of the new foam is appealing. Having a shoe that lasts longer is obviously good, but Adidas also claim that the new foam is more consistent through most of its lifespan, rather than gradually decaying in the way EVA does. Adidas also claims that their new foam does not change characteristics in extreme temperatures like EVA does.
5 A Comparison with other Recommended Shoes
| If you're looking for "the best of the best" running shoe, here are my top picks. Of course, the answer will depend a little on what you're looking for, so I have recommendations for various categories.
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For a more detailed on running shoes see the Recommendations for Best Running Shoes. This table lists the key attributes of What to Look for in Running Shoes. For more detailed information, on the shoes see detailed shoe comparison.
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Full Review |
Brand | Name | Rating | Recommended price |
Benefit | Weight (oz) |
Penalty (sec/mile) |
Forefoot Thickness |
Heel Thickness |
Loaded Drop mm |
Cushioning | Flexibility |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saucony Type A Review | Saucony | A/A7 | Recommended | $100 | 6.4 | 6.7 | 12.1 | 19 | 22 | 1 | 4.3 | 7 |
| Saucony Type A6 Review | Saucony | A6 | Highly Recommended | $100 | 8.2 | 6.1 | 9.5 | 17 | 21 | 4 | 5.0 | 7 |
| Saucony Type A8 Review | Saucony | A8 | Highly Recommended | $90 | 7.5 | 6.2 | 9.7 | 19 | 20 | -1 | 4.7 | 7 |
| Adidas Adios Boost 2 Review | Adidas | Adios | Worth considering | $140 | 4.7 | 8.6 | 13.4 | 17 | 27 | 11 | 4.0 | 6 |
| Hoka Bondi 5 Review | Hoka | Bondi | Recommended | $150 | 6.1 | 11.6 | 18.1 | 38 | 42 | 5 | 7.1 | 2 |
| Hoka Clayton 2 Review | Hoka | Clayton2 | Highly Recommended | $150 | 9.1 | 8.3 | 12.9 | 23 | 28 | 1 | 7.5 | 5 |
| Hoka Clifton 4 Review | Hoka | Clifton4 | Worth considering | $130 | 7.7 | 9.3 | 14.5 | 30 | 35 | 10 | 7.2 | 3 |
| ON Cloudflash Review | On Cloud | Cloudflash | Worth considering | $180 | 4.4 | 8.3 | 14.6 | 19 | 26 | 7 | 3.7 | 6 |
| On Cloudracer Review | On Cloud | Cloudracer | Worth considering | $130 | 5.7 | 8.2 | 12.8 | 19 | 27 | 5 | 4.7 | 7 |
| ON Cloud X Review | On Cloud | CloudX | Not recommended | $140 | 4.5 | 8.3 | 16.3 | 21 | 27 | 7 | 3.8 | 7 |
| Mizuno Wave Cruise Review | Mizuno | Cruise | Worth considering | $120 | 6.6 | 5.9 | 12.5 | 17 | 20 | 7 | 3.9 | 6 |
| Newton Distance IV Review | Newton | Distance | Worth considering | $155 | 7.5 | 9.1 | 14.2 | 26 | 31 | 3 | 6.8 | 5 |
| Asics Gel DS Racer 10 Review | Asics | DS Racer | Worth considering | $110 | 8.2 | 7.0 | 10.9 | 21 | 26 | 6 | 5.8 | 5 |
| Altra Duo Review | Altra | Duo | Recommended | $130 | 6.0 | 8.4 | 13.1 | 29 | 29 | 1 | 5.0 | 5 |
| Mizuno Wave Ekiden 8 Review | Mizuno | Ekiden | Worth considering | $115 | 5.7 | 5.7 | 14.6 | 13 | 18 | 6 | 3.2 | 8 |
| Saucony Endorphin 2 Review | Saucony | Endorphin 2 | Worth considering | $115 | 8.0 | 5.1 | 9.6 | 15 | 13 | -1 | 4.1 | 8 |
| Adidas Energy Boost Review | Adidas | Energy | Worth considering | $160 | 7.2 | 10.0 | 15.6 | 20 | 30 | 7 | 7.2 | 5 |
| Altra Escalante Review | Altra | Escalante | Best of the Best | $130 | 9.1 | 8.7 | 13.5 | 28 | 25 | -1 | 7.9 | 6 |
| Altra Escalante 1.5 Review | Altra | Escalante 1.5 | Best of the Best | $130 | 8.2 | 9.0 | 14.0 | 26 | 27 | -1 | 7.4 | 7 |
| Saucony Fastwitch Review | Saucony | Fastwitch | Highly Recommended | $90 | 9.5 | 7.1 | 11.1 | 20 | 22 | 4 | 6.8 | 7 |
| Topo Fli-Lyte 2 Review | Topo | Fli-Lyte2 | Highly Recommended | $100 | 6.7 | 9.1 | 14.2 | 24 | 26 | 3 | 6.1 | 5 |
| Reebok Floatride Run Review | Reebok | Floatride | Worth considering | $150 | 7.7 | 9.6 | 14.9 | 28 | 34 | 10 | 7.4 | 5 |
| Saucony Freedom Review | Saucony | Freedom | Recommended | $160 | 5.4 | 10.7 | 16.6 | 25 | 29 | 3 | 5.8 | 6 |
| Skechers GORun 4 Review | Skechers | GORun | Not recommended | $100 | 6.1 | 7.5 | 11.7 | 15 | 23 | 3 | 4.5 | 7 |
| Skechers GOrun Ultra 2 Review | Skechers | GRU | Worth considering | $90 | 7.5 | 10.0 | 15.6 | 28 | 34 | 8 | 7.5 | 4 |
| Asics GT 2000 Review | Asics | GT 2000 | Not recommended | $120 | 4.8 | 11.2 | 17.4 | 28 | 35 | 5 | 5.4 | 2 |
| New Balance Hanzo S Review | New Balance | Hanzo | Worth considering | $110 | 7.6 | 6.9 | 10.7 | 21 | 19 | 2 | 5.2 | 5 |
| Hoka Hupana Review | Hoka | Hupana | Recommended | $115 | 6.1 | 8.9 | 13.9 | 31 | 36 | 7 | 5.4 | 4 |
| Asics Gel Hyper Speed 7 Review | Asics | Hyper Speed | Highly Recommended | $75 | 10.9 | 6.3 | 9.8 | 22 | 26 | 5 | 6.8 | 6 |
| Altra Instinct 4.0 Review | Altra | Instinct 4.0 | Worth considering | $120 | 6.0 | 9.8 | 15.3 | 29 | 25 | -1 | 5.9 | 5 |
| Asics Tarther Kainos 3 Review | Asics | Kainos | Worth considering | $130 | 10.0 | 6.9 | 10.7 | 17 | 27 | 9 | 6.8 | 6 |
| Altra King MT 1.5 Review | Altra | King MT | Recommended | $140 | 7.5 | 10.7 | 16.7 | 19 | 21 | 3 | 8.0 | 5 |
| Saucony Kinvara 8 Review | Saucony | Kinvara 8 | Best of the Best | $110 | 9.3 | 8.6 | 13.4 | 26 | 31 | 3 | 8.0 | 5 |
| Altra Lone Peak 3.5 Review | Altra | Lone Peak | Highly Recommended | $120 | 4.2 | 11.4 | 17.7 | 24 | 25 | 4 | 4.8 | 5 |
| Nike Zoom Streak LT 3 Review | Nike | LT3 | Best of the Best | $80 | 9.8 | 5.4 | 8.4 | 16 | 21 | 5 | 5.3 | 7 |
| Nike Zoom Streak LT 4 Review | Nike | LT4 | Recommended | $90 | 8.5 | 5.5 | 8.5 | 15 | 21 | 3 | 4.6 | 6 |
| Nike LunarSpider R5 Review | Nike | LunarSpider | Recommended | $125 | 6.9 | 6.7 | 10.4 | 17 | 21 | 3 | 4.6 | 6 |
| Hoka Mafate Speed Review | Hoka | Mafate | Best of the Best | $170 | 7.6 | 11.9 | 18.5 | 39 | 40 | 4 | 9.0 | 1 |
| Pearl Izumi EM Road N0 v2 Review | Pearl | N0 | Highly Recommended | $100 | 7.9 | 6.5 | 10.1 | 14 | 20 | 4 | 5.2 | 8 |
| Saucony Nomad Review | Saucony | Nomad | Worth considering | $110 | 4.3 | 10.5 | 17.2 | 25 | 27 | 2 | 4.5 | 4 |
| Hoka Odyssey Review | Hoka | Odyssey | Highly Recommended | $130 | 8.5 | 9.4 | 14.6 | 37 | 45 | 5 | 8.0 | 3 |
| Altra Olympus 2.5 Review | Altra | Olympus | Highly Recommended | $150 | 4.6 | 11.8 | 18.4 | 35 | 34 | 0 | 5.4 | 6 |
| Altra One 3.0 Review | Altra | One | Recommended | $100 | 6.1 | 8.8 | 13.7 | 23 | 23 | 0 | 5.4 | 6 |
| Altra Paradigm 4.0 Review | Altra | Paradigm | Highly Recommended | $150 | 5.3 | 11.0 | 17.1 | 28 | 30 | 5 | 5.8 | 8 |
| Asics Piranha SP 5 Review | Asics | Piranha | Recommended | $100 | 10.1 | 4.2 | 6.5 | 11 | 15 | 3 | 4.2 | 9 |
| Brooks PureFlow 5 Review | Brooks | PureFlow | Worth considering | $110 | 6.0 | 9.7 | 15.1 | 26 | 29 | 5 | 5.8 | 8 |
| Salming Race Review | Salming | Race | Worth considering | $130 | 6.9 | 6.5 | 10.1 | 16 | 19 | 4 | 4.5 | 6 |
| Altra Escalante Racer Review | Altra | Racer | Highly Recommended | $140 | 6.6 | 7.6 | 11.8 | 24 | 26 | 6 | 5.0 | 8 |
| New Balance RC1600 v2 Review | New Balance | RC1600 | Highly Recommended | $110 | 8.8 | 5.6 | 8.7 | 15 | 21 | 5 | 4.9 | 8 |
| New Balance RC5000v2 Review | New Balance | RC5000v2 | Best of the Best | $125 | 14.2 | 4.0 | 6.2 | 13 | 21 | 6 | 5.7 | 7 |
| Skechers GoRun Ride 3 Review | Skechers | Ride | Worth considering | $85 | 5.9 | 8.5 | 13.2 | 18 | 28 | 6 | 5.0 | 8 |
| Nike RN Distance 2 Review | Nike | RNDist2 | Worth considering | $120 | 8.0 | 9.2 | 14.3 | 25 | 28 | 4 | 7.4 | 7 |
| Inov-8 RoadXTreme 220 Review | Inov-8 | RXT-220 | Worth considering | $120 | 5.2 | 8.0 | 18.2 | 14 | 17 | 3 | 4.2 | 8 |
| Salomon Sense Ride Review | Salomon | Sense | Worth considering | $120 | 8.5 | 10.0 | 15.6 | 26 | 29 | 6 | 8.5 | 0 |
| Altra Solstice Review | Altra | Solstice | Highly Recommended | $90 | 7.1 | 8.1 | 12.5 | 23 | 25 | 0 | 5.7 | 5 |
| Topo ST-2 Review | Topo | ST-2 | Highly Recommended | $90 | 8.2 | 7.3 | 11.4 | 20 | 18 | 0 | 6.0 | 7 |
| Hoka Stinson Lite Review | Hoka | Stinson | Highly Recommended | $160 | 7.3 | 11.6 | 18.1 | 35 | 40 | 6 | 8.5 | 0 |
| Altra Superior | Altra | Superior | Highly Recommended | $110 | 5.6 | 9.9 | 15.5 | 21 | 25 | -1 | 5.5 | 4 |
| Adidas Takumi Sen 3 Review | Adidas | Takumi Sen 3 | Highly Recommended | $160 | 7.7 | 6.6 | 10.2 | 17 | 21 | 4 | 5.1 | 5 |
| Topo Terraventure | Topo | Terraventure | Review Pending | $110 | 2.6 | 10.8 | 27.5 | 24 | 24 | 0 | 2.8 | 10 |
| Altra Timp Review | Altra | Timp | Best of the Best | $130 | 3.7 | 11.6 | 18.1 | 30 | 31 | -1 | 4.3 | 6 |
| Altra Torin 2.0 Review | Altra | Torin | Worth considering | $125 | 3.4 | 9.6 | 20.7 | 30 | 25 | 1 | 3.3 | 9 |
| Altra Torin 3.5 Review | Altra | Torin 3.5 | Worth considering | $125 | 5.8 | 9.3 | 14.5 | 27 | 28 | 0 | 5.4 | 8 |
| Hoka Tracer Review | Hoka | Tracer | Recommended | $130 | 7.2 | 7.4 | 11.5 | 21 | 24 | 2 | 5.3 | 5 |
| Merrell Trail Glove 4 Review | Merrell | Trail Glove 4 | Best of the Best | $100 | 3.4 | 8.4 | 23.8 | 13 | 13 | 0 | 2.8 | 10 |
| Topo Tribute Review | Topo | Tribute | Recommended | $100 | 5.9 | 7.3 | 11.4 | 20 | 18 | -1 | 4.3 | 6 |
| Mizuno Wave Universe 5 Review | Mizuno | Universe | Highly Recommended | $125 | 10.7 | 3.1 | 10.6 | 9 | 12 | 1 | 3.3 | 9 |
| Altra Vanish-R Review | Altra | Vanish-R | Recommended | $100 | 16.1 | 5.3 | 8.2 | 19 | 21 | 4 | 8.5 | 6 |
| Merrell Vapor Glove 3 Review | Merrell | Vapor Glove 3 | Highly Recommended | $85 | 2.1 | 6.1 | 27.6 | 6 | 5 | 0 | 1.3 | 10 |
| Nike Vaporfly 4% Review | Nike | Vaporfly | Best of the Best | $250 | 10.4 | 7.2 | 11.2 | 25 | 37 | 8 | 7.5 | 2 |
| New Balance Vazee Pace Review | New Balance | Vazee Pace | Worth considering | $110 | 6.0 | 8.6 | 13.4 | 18 | 24 | 6 | 5.2 | 5 |
| Asics TartherZeal 3 Review | Asics | Zeal | Worth considering | $140 | 10.9 | 6.3 | 9.8 | 17 | 27 | 9 | 6.8 | 6 |
| Saucony Zealot 3 Review | Saucony | Zealot3 | Recommended | $130 | 8.9 | 9.5 | 14.8 | 29 | 32 | 4 | 8.5 | 6 |
| Nike Zoom Fly Review | Nike | Zoom Fly | Worth considering | $150 | 8.3 | 8.7 | 13.5 | 29 | 36 | 8 | 7.2 | 3 |
It's not a running shoe, but I love the Hoka Tor Ultra hiking boot and I've tested the Altra Lone Peak Boot, the Hoka Tor Speed 2, and the Inov-8 Roclite 325 hiking boots
Older shoe reviews: Saucony Hattori Review, Mizuno Cursoris Review, Skechers GO Bionic 2 Review, Hoka Clifton Review, Saucony Virrata 2 Review, Brooks PureCadence 3 Review, Brooks PureConnect 3 Review, Brooks PureFlow 3 Review, Skechers GO Bionic 2 Review, New Balance 980 Review, Brooks Transcend 2 Review, Hoka Huaka Review, Patagonia EVERlong Review, Asics 33-DFA Review, Hoka Conquest Review, Saucony Cortana Review, Puma Faas 100 R Review, Saucony Fastwitch Review, Nike Free Review, Asics Gel Lyte 33 Review, Skechers GOmeb Speed Review, Skechers GOrun Ultra Road Review, Nike LunaRacer Review, Altra Paradigm Review.