Pirelli motorsport director Paul Hembrey says that a three stop strategy is likely to be the best approach in this weekend's Malaysia Grand Prix.
Last year, a wet/dry race led to winner Fernando Alonso stopping three times.
"We would describe Sepang as genuinely ‘extreme’: both in terms of weather and track surface. This means that it is one of the most demanding weekends for our tyres that we experience all year," said Hembrey.
"For the first time we see our new Orange hard compound in competition, with this colour chosen to make it more easy to distinguish from the white medium on television. The nomination we have for Malaysia is the same as last year, but the compounds themselves offer more performance and deliberately increased degradation this season."
Lotus's Kimi Raikkonen emerged victorious in the Australian Grand Prix having stopped twice but his nearest challengers all stopped three times.
Hembrey believes that the typical Malaysian weather will play a part.
"Last year three stops proved to be the winning strategy in a mixed wet and dry race, with a thrilling finish between Fernando Alonso and Sergio Perez that was all about tyres. We’d expect three stops again but once more it’s likely to be weather that dominates the action. Even when it isn’t raining, the drivers can expect humidity in the region of 80% and ambient temperatures of more than 30 degrees centigrade."