Road Trail Run: adidas Ultra Boost 20 Review - International Space Station Approved, Earth's Gravity proves too much to handle
Road Trail Run: adidas Ultra Boost 20 Review - International Space Station Approved, Earth's Gravity proves too much to handle
![With a 50 mm stack height (pic 2), does it mean you cannot race in the new Adidas Adizero Prime X, since only -40mm is legal in road running? : r/RunningShoeGeeks With a 50 mm stack height (pic 2), does it mean you cannot race in the new Adidas Adizero Prime X, since only -40mm is legal in road running? : r/RunningShoeGeeks](https://preview.redd.it/b7m0mvul3n571.jpg?width=640&crop=smart&auto=webp&s=2444445e3adfc8053f5f2bd13170477f7a57d048)