For 2007 onwards, Formula One racing features just one tyre supplier, with all teams using identical Bridgestone rubber. The aims of this move are to create closer racing and to reduce testing and development costs.
At each Grand Prix every team will be given access to two specifications of dry-weather tyre and each driver must make use of both specifications during the race (wet races excepted). A white groove on the tread of the softer of the two available compounds will allow spectators to distinguish which tyre a driver is using.
Over the race weekend, each driver has access to 14 sets of dry-weather tyres. Four of those sets (two sets of each specification) may be used on Friday, with the remaining 10 sets (five of each specification) available from Saturday morning onwards. Prior to qualifying each driver must surrender one set of each specification.
The dry-weather tyres have four grooves and the spacing and depth of these grooves must conform to strict specifications. Although there are currently no regulations on tyre wear during a race, the FIA reserve the right to introduce appropriate procedures if they feel teams are obtaining a performance gain from using very worn tyres.
Teams are free to use wet-weather tyres as they see fit during qualifying and the race. However, during the preceding practice sessions wet-weather tyres may only be used if the track has been declared wet by the race director. Bridgestone may bring different types of wet-weather tyre to cope with various conditions, but all must be pre-approved by the FIA.
All tyres are given a bar code at the start of the weekend so that the FIA can closely monitor their use and ensure that no team is breaking regulations.