Segway miniPRP and Xiaomi Mini 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 Segway miniPro and Xiaomi use tires 70/65-6.5. In addition to the standard version "off-road" tires for Segway miniPROexists.
You can purchase tires for Segway miniPRO here: