The Structure 18 was an amazing shoe. One of my favorites I’ve owned. I missed out on the 19, due to going for its more cushioned cousin, the Odyssey. The 20, much like the 18, is a rebuild from the ground up, though this time it brings some challenges.

The snappiness of the forefoot remains, thankfully. The upper is comfortable and not really noticeable. The new Flywire system is limited to the top two eyelets, but this doesn’t hurt the lockdown of the shoe. This shoe, the LunaRacer 4, and the Zoom Steak 6 lead me to believe Nike could be transitioning away from Flywire, or at least a re-imagining of it, as in leaked Vomero 12 photos.

Now, for the midsole. Fans of the Brooks Adrenaline, New Balance 860, or Asics GT series will find a lot to like here. It feels as solid as any of those and tough enough for heavier runners. Problem is, it doesn’t feel like a Nike shoe. The previous Structures felt supportive, but also flexible enough for a smooth transition. The 20 is much more rigid. I blame this primarily on the outsole, which has an enormous coverage. I would wager this make it last quite a while, but it adds weight and reduces flexibility.

This is the most supportive Structure yet, but it also feels the clunkiest. Hopefully, the 21 can make some adjustments to the outsole configuration and trim some of the weight.

Verdict: 7.5/10

Nike Women’s Air Zoom Structure 20 Purple Dynasty/White Fire Pink Running Shoe 8 Women US

Nike Men’s Air Zoom Structure 20 Black/White/Photo Blue Running Shoe 9.5 Men US

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