darcyw

I really liked the Continental extreme contact sports in OEM sizing on my AP1 (its a 340 UTQG). I really liked the RS-3 as well (now RS-4). Z2 Dunlops were excellent overall as well. Really, if you choose any 200 UTQG you'll be doing well.

darcy

d1000rr

For street just get the Pilot Supersport... or is it the Pilot 4S now?

The Pilot SS are quiet, grippy, longer lasting than a RE71R, comfortable, and overall a great street/weekend canyon tire.

osu1978

I run Conti extreme contact sports 225/255, 33 PSI on my 2006.

DavidNJ

The Michelin Pilot Super Sport has been the best in class since 2011. The Bridgestone RE11a (the "a" is important) as probably better on the 2800lb S2000; however, it is no longer available.

Michelin replaced the PSS with the PS4. However, it is, for practical purposes, only available in 19" sizes.

For performance in autocross events, the RE71r or BFG Rival S 1.5 (the ".5" is important) will be faster. For track days, the Hankook RS4, while not a leading autocross tire, would wear better. There are also some other brands common on track days for their handling and tread life in those events. On a race track, the tire operates at higher temps than it will ever see on the street and doesn't have to deal with the cold weather and extreme rain a street tire may see.

Net: Michelin PSS for a street car. RE71r (new 2015) or Rival S 1.5 (new 2017) for a competitive autocross car, unless there is a new, faster tire for 2018.

Note: I use the RE71r for street and autocross, but generally don't drive the S2000 in bad weather.