Pirelli¿s Paul Hembery says they are happy with work on next season's tyre range after a prototype was tested in Brazil on Friday.

Pirelli's Paul Hembery says they are happy with work on next season's tyre range after a prototype was tested at the Brazilian Grand Prix on Friday.

Pirelli hope the new tyres will offer a quicker warm-up time and also a wider performance window. A major talking point this season - particularly during the early races - was how difficult it has been to get the rubber to perform. Hembery added that each 2013 compound will be softer than those used at present. "It'll be pretty similar to last year: you'll move down a level. But this time we won't be keeping the supersoft, even that's going down as well. On the street circuits, even that was lasting forever with the current cars."