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The Adizero Prime X3 Strung is adidas' max-stack road racing shoe, built for neutral runners who want the most foam and carbon-plate propulsion the rules allow. It pairs a full-length carbon plate with a tall Lightstrike Pro foam stack and a knit Strung upper that wraps the foot. The stack is so high that World Athletics bans it from official races, so it is best treated as a training and time-trial tool. At $182 at eBay as of November 8, 2026, it sits well below its usual launch pricing, a strong deal for a shoe this spec-heavy.
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Availability unknown
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Lowest price we've seen: $179.95 on Nov 8 at shoebacca.com. Tracked across 18 stores since Nov 8.
Runners rate it highly, praising the cushioning and propulsion on tempo and long efforts. Most criticism centers on the illegal-for-racing stack, instability at easy paces and durability of the outsole.





