footwear new balance ypntrbp4 dark red | 700+ shoes reviewed and cut in half

29 currently testing

32 bought and to be entre

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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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Testing process

New Balance 400 - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
New Balance 400 - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
New Balance 400 - Comparing the results
3. Our tests are standardized, and our results are comparable.
New Balance 400 - Wear test
4. We also wear test shoes in their appropriate settings.
New Balance 400 - No bias
5. No bias: we buy all the shoes on our own and accept no sponsorships.