Right now we only have "road normal" and "road super" tires. There should be more road tires, like "economy", and those "DOT approved" tires. Also, another nice tire would be a drag radial.
but there would be no point for them, considering youd want the most gripping tires. The point of this game is to race, so economy tires wouldnt make sense.
hydrids: going on the green lol jk it's for rally
normals: for road courses, less grip but longer lasting
supers: for road courses, ++ grip short lifespan.
Optimal tire temp, tire life (not sure if the normals actually last longer than supers, but I'm pretty sure the tarmac tires last a lot longer than the dirt tires on pure tarmac).
Forbin supers get red a bit sooner than normals. On say Blackwood you have problems at the end of the first lap, with normals you can drift almost 2 laps with no bigger problems.