adidas gray alphabounce trainers for sale by owner | 900+ shoes reviewed and cut in half

Guides

We go down the rabbit hole when it comes to running shoe technologies, features, and lab tests. See all our in-depth guides.

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Why cutting running shoes in half is key to measuring midsole softness

The role of heel counters in running shoes

A runner's guide to choosing the right toebox

The definitive guide to running shoe breathability

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How brands' heel-to-toe drop measurements differ from reality in running shoes

Understanding differences between men's and women's running shoes

In-depth insights into running shoe outsoles (road & trail)

How much does the weight vary across different running shoe sizes?