Tires for Segway miniPRO
Ninebot miniPRO and Xiaomi use the same tires. You need to check the tire size. You can read about how tires index to better understand "the mystery". By default both Ninebot miniPRO and Xiaomi use tires 70/65-6.5. In addition to the standard version "off-road" tires for MiniPro exists.
You can purchase tires for both Ninebot MiniPro and Mini here: