Adizero Gear Shift is a new concept shoe featuring a tunable plate

The Adizero Gear Shift is a new concept shoe featuring a tunable plate that lets runners toggle between a softer or firmer ride mid-stride.

Designed to combat mechanical fatigue during ultra-endurance efforts, the Gear Shift comes in two prototypes:
- Manual Shift: Physical switch allowing athletes to adjust plate stiffness on the fly as their legs degrade late in a race.
- Digital Shift: Smart variant that syncs directly with a GPS watch, allowing runners to pre-program plate stiffness to auto