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Adidas X9000L4 vs Adidas UltraBoost 21 Performance Review

Ideally, a fan-favourite silhouette like the UltraBoost would deserve its own review but we thought that its best we pit it against Adidas’ own X9000 series, what do both have in common? Read on to find out. No matter how hard Adidas tries to push the UltraBoost at the forefront of running, it eventually gets…

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