The toys with the ZT-19 GS wheels are now available at Gamestop.
Where do the ZT-19 wheels come from?
Where is the official announcement?(Edit: Official announcement was made after I asked my question)
ZT-19 Wheels are tied to toys that have not been released yet. The ZT-19 GS Wheels are part of the new Series 2 Pull-Back Racers that released at GameStop last week.