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://i.redd.it/4sv30xul3n571.jpg)
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
![Road Trail Run: adidas Ultraboost Light Multi Tester Review: Massive Weight Drop! Now a "Real" Run Trainer? 8 Comparisons Road Trail Run: adidas Ultraboost Light Multi Tester Review: Massive Weight Drop! Now a "Real" Run Trainer? 8 Comparisons](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUsbnUbi1w73GRi9qbmsYxV81-0PQSO1ioEgnGYWwPB2V896yYA7ZyXqpxDPaeiA7Uu36Z4q5OJae3pI6nbiGq_wQQ90TLm76IIJtWsNeO1JWzZRVhJAkjU3Zha_9ifqtzr2zxmNsbLnxzayfzznOWYjkHAqt82pF3dc904V5VHMi0zX0SDQE/s1600/IMG_7724.jpeg)