Probably because they are designed for law enforcement pursuit vehicles and not the general public… Firestone doesn’t even show them on their website for sale… But they are in the POS system, and they are not made in every size, only sizes used by LEO’s…
Again they are Pursuit tires… lol
Firestone makes a;
Firehawk AS,
Firehawk GT,
Firehawk Pursuit and a
Firehawk GT Pursuit
in your 215/55R17 size, that I can think of at this time.. Remember that even though the names (Firehawk GT and Firehawk GT Pursuit) are very close, they are different tires…