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Tyres

Published with permission from the Federation Internationale de l'Automobile.

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 2014, 2015 and 2016 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:
a) 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. At certain Events one additional specification of dry-weather tyre may be made available to all teams for evaluation purposes following a recommendation to the FIA from the appointed tyre supplier. Teams will be informed about such an additional specification at least one week before the start of the relevant Event.
b) One specification of intermediate tyre at each Event which must be of one homogenous compound.
c) One specification of wet-weather tyre at each Event which must be of one homogenous compound.
25.2 Quantity of tyres during an Event:
a) Except under Article 25.1(a) and d) below, no driver may use more than 13 sets of dry-weather tyres, seven of “prime” specification and six of “option” specification.
b) Except under e) below, no driver may use more than four sets of intermediate tyres and three sets of wet-weather tyres.
c) A set of tyres will be deemed to comprise two front and two rear tyres all of which must be of the same specification.
d) Following a recommendation to the FIA from the appointed tyre supplier, one additional set of either “prime” or “option” specification tyres may be made available to all drivers. Teams will be informed about such an additional set at least one week before the start of the relevant Event.
e) If either P1 or P2 are declared wet one additional set of intermediate tyres will be made available to all drivers. Under such circumstances, one used set of intermediate tyres must be returned to the tyre supplier before the start of P3.
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.
25.4 Use of tyres:
Tyres will only be deemed to have been used once the car's timing transponder has shown that it has left the pit lane.
a) Thirteen sets of dry-weather tyres will be allocated by the FIA technical delegate to each nominated driver seven of “prime” specification and six of “option” specification.
One set of “prime” specification may only be used during the first 30 minutes of P1 and must be returned to the tyre supplier before the start of P2.
One further set of “prime” specification tyres must be returned to the tyre supplier before the start of P2 and one further set of “prime” specification tyres and one set of “option” specification tyres before the start of P3. If P1 and P2 are both declared wet one set of the tyres normally returned before the start of P3 may be retained by each driver but must be returned to the tyre supplier before the start of the qualifying practice session.
If Article 25.2(d) is invoked an additional set of either “prime” or “option” specification tyres will be available to each nominated driver for use during P1 and P2. This set of tyres must be returned to the tyre supplier before the start of P3.
One set of “option” specification tyres may only be used during Q3, by those cars that qualified for Q3, and must be returned to the tyre supplier before the start of the race.
One set of “option” specification tyres, which were allocated to cars which did not qualify for Q3, may only be used during the race.
If an additional driver is used (see Article 19.1(b) he must use the tyres allocated to the nominated driver he replaced.
b) If an additional specification of dry-weather tyre is made available in accordance with Article 25.1(a) two sets of these tyres will be allocated to each driver for use during P1 and P2. Any such tyres must be returned to the tyre supplier before the start of P3.
c) From the remaining dry-weather tyres one set of each specification must be returned to the tyre supplier before the start of the qualifying practice session.
d) 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.
e) At the start of the race each car which qualified for Q3 must be fitted with the tyres with which the driver set his fastest time during Q2. This will only be necessary if dry-weather tyres were used to set the grid time and if dry-weather tyres 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.
A penalty under Article 16.3(c) will be imposed on any driver whose car is not fitted with the tyres with which he set his grid time (except if damaged tyres have been replaced with the approval of the FIA technical delegate).
f) 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.
g) If the race is started behind the safety car because of heavy rain (see Article 40.16), 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.
A penalty under Article 16.3(c) will be imposed on any driver who does not use wet weather tyres whilst the safety car is on the track at such times.
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.