It looks like you're new here. If you want to get involved, click one of these buttons!
UHP = Ultra High Performance = P Zero = really really good sports tyre for summer. Think real life Michelin Pilot Sport or Pirelli P Zero. (EDIT: I originally wrote "P Zero Corsa" here, when I obviously meant P Zero!)XR = Extreme = P Zero Corsa = super good sports tyre for summer, essentially a semi-slick. Still road legal, but you'd probably rather leave them for the track, if only for the wear and cost of getting a new set. Think real life P Zero Corsa or Michelin Pilot Sport Cup (2 particularly, which bumped up the performance a LOT compared to previous ones).Track = P Zero Trofeo = semi-slick intended purely for track use. Might be legal on the roads somewhere in the world. Best grip. (EDIT: Though they aren't as user friendly as the others. They're much more twitchy when cold and feel quite different when warm as well, but I've always easily gotten my fastest laps with these, and they also measure the highest cornering G forces. If the car is soft enough they can also upset the suspension, throwing the body around too much. These tyres require the car to be set up for track use, a street setup doesn't like these tyres that much.)