25) SUPPLY OF TYRES IN THE CHAMPIONSHIP AND TYRE LIMITATION DURING THE EVENT
25.1 Supply of tyres :
A single tyre manufacturer has been chosen by the FIA for the 2011, 2012 and 2013 seasons following an invitation for tenders to supply tyres to all the cars entered in Championship Events for the duration of these seasons. A single tyre manufacturer will be chosen by the FIA for subsequent seasons following an invitation for tenders to supply tyres to all the cars entered in Championship Events for the duration of such subsequent seasons.
The appointed tyre supplier must undertake to provide :
- two specifications of dry-weather tyre at each Event, each of which must be of one homogenous compound and visibly distinguishable from one another when a car is on the track ;
- one specification of intermediate tyre at each Event which must be of one homogenous compound ;
- one specification of wet-weather tyre at each Event which must be of one homogenous compound.
25.2 Quantity of tyres :
During the Event no driver may use more than eleven sets of dry-weather tyres (six of prime specification and five of option specification), four sets of intermediate tyres and three sets of wet-weather tyres.
A set of tyres will be deemed to comprise two front and two rear tyres all of which must be of the same specification.
25.3 Control of tyres :
a) The outer sidewall of all tyres which are to be used at an Event must be marked with a unique identification.
b) Other than in cases of force majeure (accepted as such by the stewards of the meeting), all tyres
intended for use at an Event must be presented to the FIA technical delegate for allocation prior to
the end of initial scrutineering.
c) At any time during an Event, and at his absolute discretion, the FIA technical delegate may select
alternative dry-weather tyres to be used by any team or driver from among the stock of tyres the
appointed supplier has present at the Event.
d) A competitor wishing to replace one unused tyre by another identical unused one must present both
tyres to the FIA technical delegate.
e) The use of tyres without appropriate identification may result in a grid position penalty or exclusion
from the race.
f) The only permitted type of tyre heating devices are blankets which use resistive heating elements.
The heating elements may only act upon the outer tyre surface.
25.4 Use of tyres :
Tyres will only be deemed to have been used once the cars timing transponder has shown that it has left
the pit lane.
a) Three sets of dry-weather tyres will be allocated by the FIA technical delegate to each nominated
driver for use during P1 and P2, two of prime specification and one of option specification. These
are the only dry-weather tyres which may be used during these sessions.
One set of prime specification must be returned to the tyre supplier before the start of P2 and one
further set of prime specification and one set of option specification before the start of P3.
If an additional driver is used (see Article 19.1(b) he must use the tyres allocated to the nominated
driver he replaced.
b) Eight further sets of dry-weather tyres will be allocated by the FIA technical delegate to each
nominated driver, four of each specification, for use during the remainder of the Event. However, one
set of each specification must be returned to the tyre supplier before the start of the qualifying
practice session and may not be used during the remainder of the Event.
c) Prior to the start of the qualifying practice session intermediate and wet-weather tyres may only be
used after the track has been declared wet by the race director, following which intermediate, wet or
dry-weather tyres may be used for the remainder of the session.
d) At the start of the race each car which took part in Q3 must be fitted with the tyres with which the
driver set his grid time. This will only be necessary if dry-weather tyres were used to set the grid time
and if dry-weather are used at the start of the race.
Any such tyres damaged during Q3 will be inspected by the FIA technical delegate who will decide, at
his absolute discretion, whether any may be replaced and, if so, which tyres they should be replaced
with.
e) Unless he has used intermediate or wet-weather tyres during the race, each driver must use at least
one set of each specification of dry-weather tyres during the race.
If the race is suspended and cannot be re-started, thirty seconds will be added to the elapsed time of
any driver who was unable to use both specifications of dry-weather tyre during the race. However,
any driver who completes the race without using both specifications of dry-weather tyre will be
excluded from the race results.
f) If the race is started behind the safety car because of heavy rain (see Article 40.14), or resumed in
accordance with Article 42.5(a), the use of wet-weather tyres until the safety car returns to the pits is
compulsory.
25.5 Testing of tyres :
a) Tyres supplied to any competitor at any time may not be used on any rig or vehicle (other than an F1
car on an F1 approved track, at the exclusion of any kind of road simulator), either Team owned or
rented, providing measurements of forces and/or moments produced by a rotating full size F1 tyre,
other than uniquely vertical forces, tyre rolling resistance and aerodynamic drag.
b) Tyres may be used on a test rig providing forces control and monitoring by F1 rim manufacturers for
the sole purpose of proof testing their products.
Istanbul is his track.
