Overview
- Steiner filed the lawsuit Friday in Middlesex County Superior Court in Massachusetts, naming Puma and Mercedes‑Benz Grand Prix.
- She alleges carbon‑fiber plates paired with Nitro foam in the shoes changed foot and ankle mechanics and triggered bone‑stress injuries.
- The complaint cites specific models, including the Deviate Nitro Elite 2 and 3 trainers and the evoSPEED Tokyo Nitro spikes.
- Steiner says the footwear forced her to stop competing at the elite level after five foot surgeries, and she seeks more than $1.25 million for medical bills and lost wages.
- The suit claims the companies knew about defects yet marketed the shoes as safe, while neither has commented and the allegations remain unproven as the case heads to a jury.