"This is the first, first version," he said, speaking in
front of a demonstration car to show off the bigger prototype
tyres.
"We are working with the teams to have 'mule cars' available as
soon as possible, they will be 2015 cars modified for the new
tyres with additional downforce to simulate the performance
expected for next year.
"When we start, probably in August, we will have a concentrated
test plan because we need to find a final version of the tire by
the end of November or December... we don't have a lot of time."
Isola said the new tyres would take a lot more speed through the
corners, with an expected improvement of four seconds in lap
time.
The plan was to stay with five compounds for 2017 but that could
change once they had been tested. Pirelli have brought a new
ultrasoft tire to Monaco this weekend.
The new, wider tyres have eight centimeters more at the rear and
six at the front -- equal to about a 20 percent increase on the
current size.
Formula One is planning sweeping changes to the aerodynamic
regulations for next year which will increase the levels of
downforce.
(Reporting by Alan Baldwin; Editing by John O'Brien)
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