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Tuesday, August 18, 2020

Adidas Solar Boost Shoes (Aug 18 Pair)

I liked my current Adidas Solar Boost ST so well that I got another pair. This is called simply SolarBoost, with no ST. I will alternate between these pairs for a while. Both Solar Boost shoes have more support in the forefoot than the Brooks shoes that I had been using. Even one day in my old, but low-milage Brooks Levitate 2's makes my big toe hurt.  



Initially the new Solar Boost pair seemed to be identical to the March 2020 Solar Boost ST pair. The sole is beige instead of black, so I hope it wears as well. The fit is just as good. I really like the Solar's upper. Link to Solar Boost ST's review.






The weight of one SolarBoost shoe is 319 grams. This compares to 338 grams on the March 2020 SolarBoost ST pair, which is 5.6% lighter. My reaction is lighter is better, but I hope the durability holds up. 

Weights of my recent shoes.

August 2020 SolarBoost        319 g
March 2020 Solar Boost ST    338 g
Brooks Levitate 2                 365 g
Brooks Ghost 9                     335 g
2018 Pure Boost                    335 g
2015 Boost SuperNova          335 g
2012 Energy Boost                300 g


After seeing the weight difference, I looked back at differences in construction, and there is a slight difference in the over-molded heel cup on the upper. On the new SolarBoost, the nylon* overmolding is smaller and covered by a piece of the elastomer which joins the midsole and the upper. 

Below is a photo of the SolarBoost ST for comparison with above. 

Solar Boost ST (Mar 2020)







*It looks like nylon/polyamide to me, but of course I didn't analyze it. It could be a similar rigid engineering plastic. 

Adidas Solar Boost ST: March 13 2020 Pair

So many of my shoe purchases start out with sore feet. In this case it was a sore left bunion, and maybe it is caused by my too-small pair of Brook Ricochets or maybe my worn out Brooks Levitate 2s.

In any case, I went to my local shoe store, and checkout the Brooks Levitate 3's, but they are built as a slip-on shoe without shoe tongue, and so the laces cannot be used to adjust the tightness of the upper. I had a pair of shoes like once (PureBoost ZG), and while they was comfortable for standing in, they could NOT be held tightly enough on my foot. My toes either hit the front of the toe box, or the knit fabric puckered when I tightened down on the largely decorative shoe laces. Eventually I took the laces off, and used them as slippers around the house. They are still comfortable to stand in.

I read some reviews, and decided to try Adidas Solar Boost ST. I selected them because they seem to address the problems that I had with my last Boost shoes, which is too little structure, and generally floppiness to them. Of course, the Boost sole is springy and does a great job of protecting my foot. They also last a long time.

Solar Boost has somewhat less Boost expanded polyurethane and two structural features. It has a thermoplastic olefin bead between the midsole and the upper for support, and it has a dumbbell shaped nylon insert that keeps the shoe from twisting. The higher-end Boost shoes always had nylon inserts, and this version has an even larger one.

It has a knitted upper that is stretched comfortable. While the styling isn't the flashiest, this color isn't so bad.



In size 11, the SolarBoost weighs 338 g, which is 27g or 7% less than the Brook's Levitate 2s they replaced. They are about the same as my old Brooks Ghost 9's (335g). More numb

2020 Solar Boost          338 g
Brooks Levitate 2         365 g
Brooks Ghost 9             335 g
2018 Pure Boost            335 g
2015 Boost SuperNova  335 g
2012 Energy Boost        300 g


In the view below you can see how the white polyolefin elastomer near the heel provides some support and protection, but does not extend around the back of the heel.


In the following photo, one can see the nylon support that prevents twisting. This shoe sole has the Continental Tire logo. Continental has a cooperative agreement with Adidas since 2007. My 2017 Pure Boost shoes has a similar looking black rubber outersole, but no Continental logo. My Boost SuperNova has a different style outersole.


In the photo below, one can see the triangle of the nylon stabilizer extending around on the inside heel. Maybe this is for some sort of added support, or maybe it is a styling feature.


The photo below shows the weaving in the upper. It really looks like a sock in this image.



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August 2018 Update

I now have 500 miles on these shoes, and they are still doing well. They are my favorite pair of shoes now. I like them so much that I bought another pair. In the summertime, my shoes get wet from sweaty and I like to give them a day to dry out.