What tires correspond to the semi-slick tire?

I searched, perhaps not correctly, and I cannot find this information. Even a street tire can be a bit fuzzy, but I'm assuming something like a Michelin 4S would qualify, probably a Bridgestone RE-71R as well. What qualifies for semi-slick?

I looked at the Tire Rack web site for my car and the only thing that looked possible was the Toyo R888R, which is basically a racing tire with tread, hence not a slick. The Porsche GT4 defaults to semi-slick in AC and it comes with Michelin Cup2s, but they have a fair amount of tread.

The reason I'd like to know is I want to set up street-able sports cars to be reasonably similar to what I might actually drive, which might be a street or semi-slick, depending on definition. I'm pretty sure I wouldn't run R888Rs but I might run Cup2s. If AC thinks these or similar tires qualify as semi-slick I'd like to know.

 

Cup2's are semi-slicks iirc. Semi-slicks have tread, it is just in an aggressive pattern (not designed to dissipate much water) along with a low mileage softer compound of rubber. (again, iirc...this is what I found after a quick use of the Google machine)

 

That was my thought but I wasn't so sure. I also checked Google and Tire Rack. There seems to be a really wide band. Tire Rack calls the 4S a "Maximum Performance Summer" tire, the RE-71R an "Extreme Performance Summer" tire, the Cup2 a "Streetable Track and Competition" tire, and the R888 a "Racetrack and Autocross Only" tire. However, Toyo calls the R888 a semi-slick tire and some folks run them on the street.

I'm not sure where the switch occurs. I figured a tire delivered on a street car was a street tire, but maybe not. I don't know of any car that comes with the RE-71R, although there may be some. Ditto for the R888.

Unless somebody has a better idea I will go along with calling Cup2s, Trofeo Rs, R888s, etc. semi-slick and R-71Rs and 4Ss street tires. That's the way I think of them anyhow so maybe this just confirms that.

 

All semi-slicks, or R-Comps... the 4S is nowhere near and definitely a street tire. The RE71 is a cheater street tyre, so really might as well call them semi-slicks lol.

 

I'm most interested in trying to determine what I am running in AC if I select street or semi-slick. Some tires fall in the gap so just ignoring the R71 is close enough for me.

 

AC is pretty broad tyre-wise, so basically:

Semi-slicks/Hypercar Road: Street-legal tyres that can handle hardcore track work.
Street: Street tyres, lol. Performance-oriented but definitely not at home on the track.

 

Kinda..

The tread on a semi slick is designed to dissipate as much water as possible whilst using the minimum amount of tread pattern required by law.