Written by

Brandon Law

Marathon Runner and Shoe Expert
The Structure is a supportive, neutral daily trainer; the Miler is also a mid-range, supportive trainer. Here we will be comparing these two trainers.
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The Nike Structure is on its 25th version and it has evolved into a neutral trainer which is very stable. It's designed to be a well cushioned daily trainer with lots of support. It costs $120.

The Nike Miler is on its 2nd version and it is also a stable neutral trainer. It's a durable workhorse with stability features and is very versatile. It costs $130.

Which one of these Nike trainers is for you?

Similarity and differences: Structure 25 vs React Miler 2

Shoe type
Expert score
Expert score
Expert score
11.4 oz
9 oz
Heel Drop
10 mm
10 mm
The Nike Air Zoom Structure 25 is a supportive daily trainer best suited to easy runs. It has a new Cushlon 3.0 midsole and a forefoot airbag but it doesn’t have very good energy return. Compared to the Structure 24, it feels more like a traditional stability trainer because of its prominent arch. Although it has a bland ride, it’s a stable, durable workhorse, making it excellent value for its $120 price tag.
The Nike React Miler 2 is a max cushioned neutral trainer built with comfort in mind. It provides a comfortable ride with a hint of stability worthy of becoming your daily trainer.
Recommended for
Daily training
Daily training
Cushioning type
Cushioning amount
Medium cushioning
Highly cushioned
very stable
some stability
true to size
true to size
Retail price

Sole unit: Structure 25 vs React Miler 2

The midsole of the Structure is made of Cushlon 3.0 which is soft and cushioned. It has plenty of cushioning for long runs and it doesn’t bottom out.

The Miler’s midsole is made of React foam which is firmer and doesn’t compress much. It’s still highly cushioned but it doesn’t have as much long-distance comfort as the Structure.

The Structure is better suited to slow, easy runs as well as long runs because it has the softer ride. The Miler is better for shorter, faster runs because it can pick up the pace easier than the Structure.

The biggest difference between the 2 midsoles is that the Structure has a forefoot Zoom Air unit and the Miler doesn’t. This makes the Miler ride smoother than the Structure. The Structure has more energy return on toe off because of the Zoom Air unit.

Both trainers are incredibly stable. The Structure has a built up medial side to combat over pronation while the Miler has a firmer medial post to stop over pronation. Both trainers have wide midsoles and stable bases.

The Miler has the more stable ride because it has the firmer midsole so there is less lean bias in it.

When it comes to outsoles, the Structure has more rubber on its outsole than the Miler. The Miler has more exposed midsole foam on its outsole so it is less durable.

Upper unit: Structure 25 vs React Miler 2

The upper of the Structure is like the upper of a max-cushioned trainer: plush and luxurious. It has a thick, foam-filled tongue which is not attached to an inner sleeve and it has excellent foot lockdown. It fits true to size and has a spacious midfoot and toe box.

The upper of the Miler is also comfortable but it’s not as padded as the Structure so it’s cooler and better suited to warm climates than the Structure. The Miler’s tongue is flat and racing-inspired while also being attached to an inner sleeve. The Miler runs a half size large so it’s best to size down to get the perfect fit.

Which one to buy: Structure 25 vs React Miler 2

If you’re looking for a comfortable daily trainer for mainly slow runs and long runs, the Structure is the better choice. The Structure has a highly cushioned ride which is also very stable. It’s better suited to cooler climates because of its warm upper and it fits true to size.

If you prefer a firmer ride for faster runs, the Miler is the better option. It has a smoother ride because it doesn’t have an air bag and its midsole foam compresses less so it’s easier to pick up the pace in the Miler. The Miler has a more stable ride but it costs $10 more than the Structure.

This expert review is written by

Brandon Law

Marathon Runner and Shoe Expert
Brandon is a South African who lives and trains in Malaysia. He is a marathon runner who eats, sleeps and dreams running shoes. While most people wear shoes to run, he runs to wear shoes.