Pirelli, along with all the
Formula teams, tested at the Sakhir circuit twice in the build-up to the
season – so this should be a circuit that everybody knows well. However, to
celebrate its 10th anniversary, the race has been given a 6pm start time for
the first time in its history, meaning that it will start at sunset and end
in full darkness: a bit like the Abu Dhabi Grand Prix.
This will have an important effect on the behaviour of the P Zero White
medium and P Zero Yellow soft tyres that have been nominated for the race.
Ambient and track temperatures will fall considerably during the race – with
a drop in track temperature of 15 degrees entirely possible – which will
alter the performance and degradation characteristics of the tyres. As night
racing in Bahrain is an unknown quantity, the preparation work in free
practice will be essential.
Paul Hembery, Pirelli motorsport director: “Bahrain is a circuit
where we’ve done two recent tests, so we go there with a lot of knowledge of
the track, which we certainly benefit from. We know that there’s a big
traction demand and that’s why we’re bringing the medium and soft tyres.
Temperatures at the start of the race should still be reasonably high. We’ve
noted a very big drop in temperature though as soon as the sun goes down: a
variation that can be as big as 15 degrees. Managing that very wide range of
temperatures to get the best out of the tyres is going to be one of the
biggest challenges for the teams throughout the weekend. This should make it
quite tactical in terms of strategy, so it should be a very interesting race
from that point of view.”
Jean Alesi, Pirelli consultant driver: ”I’ve driven in Bahrain but
not in Formula One: instead it was in the Speedcar series, which was a
little bit like NASCAR. So I got to experience the track and see that you
need a smooth and clean rhythm to get the most out of the tyres, especially
in the traction areas, so that you don’t put too much stress through them.
The circuit is quite abrasive but it has a nice flow to it, although
competing at night will be a new challenge. The most important thing is to
try and control the degradation, but again, that might be very different
after dark. It’s going to be interesting to watch and managing the tyres is
definitely going to be important.”
The circuit from a tyre point of view:
Bahrain is quite demanding on the tyres, particularly during traction areas,
with the surface tread temperature peaking at 130 degrees centigrade.
Aerodynamics is another important factor in Bahrain. With four 300kph
straights, teams tend to use medium downforce, but this can compromise
corner entry and braking stability, causing lock-ups that damage the tyres.
Sand on the track from the surrounding desert can also disrupt traction and
cause wheelspin, leading to increased tyre degradation. Two years ago, a
sandstorm actually halted one of Pirelli’s test sessions in Bahrain.
Braking is another key characteristic of the Bahrain International Circuit:
in the first corner the cars decelerate from 315kph to 65kph in just 130
metres and three seconds. This places a force on the tyres equivalent to
Following the Bahrain Grand Prix, the first two-day in-season test will take
place (from April 8-9). Each team has to devote one day of testing to tyres
this year, with Caterham carrying out test duties on the first day in
Bahrain, and Mercedes and Williams testing tyres during day two.
Last year, Sebastian Vettel won
the race from second on the grid using a three-stop strategy: starting on
the medium tyre and then completing three stints on the hard. A wide variety
of strategies were adopted, with some drivers also stopping twice.