Pirelli will bring 2013 'prototype' tyres to Brazil this weekend for teams to test in free practice.
The manufacturer is not yet 100 percent sure where the compounds fit in yet and as such they are all being labelled as prototypes as Pirelli look to collect data to work with in the off-season.
"With no testing until February otherwise, this will be an extremely valuable opportunity for them to see what our new tyres are like as they finalise their 2013 cars - so let's hope that it doesn't rain on Friday!" said Pirelli motorsport director Paul Hembery.
"Both the compounds and construction will be different, which means that the characteristics of the new tyres will be altered, with a wider working range and some compounds that are slightly more aggressive."