If you look atthe European Schwalbe website
https://www.schwalbe.com/en/mtb-reader/billy-bonkers, the use cases are clearly BMX and not MTB or road use.
Originally Posted by Schwalbe
SAY HI TO BILLY BONKERS!
SCHWALBE’S NEW TIRE FOR PUMPTRACK, DIRTJUMP AND SLOPESTYLE.
Schwalbe website has no BMX category, only:
BMX tires are included in the MTB category.