MotoGP spec-tyre suppliers Bridgestone have proposed changes to the tyre allocations from next weekend's Laguna Seca race onwards following complaints from riders at Grand Prix Safety Commission Commission meetings.

Valentino Rossi, Jorge Lorenzo and Casey Stoner have all said they would like a change to the tyre rules allowing a softer rear option to stop cold-tyre higsides on the hard compound rears which are very difficult to get up to temperature.

For the United States Grand Prix at Laguna Seca next weekend, softer rear slicks incorporating Bridgestone’s extra soft compound rubber have been selected in a continued bid to improve warm-up performance, especially as the morning sessions can be cool.

Then from the Czech Republic Grand Prix onwards more significant changes will come into effect as Bridgestone will provide every rider with an increased number of front slick tyres, three front slick tyre compound options, and revise rear slick tyre allocation to enable riders to select a greater number of the compound option they prefer.

The previous regulations permitted two compound options of front and rear slicks and eight front and ten rear slick tyres per rider per weekend. Now, from Brno onwards, Bridgestone will prepare three compound options of front slick tyre per race and provide each rider with nine front tyres each weekend. Ten rear slick tyres will still be available in two compound options per weekend, but riders can now choose more of the tyre option they prefer, up to a maximum of six of one compound option and four of the other.

“We have worked hard with the FIM, Dorna and the riders to make this proposal and the necessary regulation amendments and we make these significant changes to our tyre compound allocation procedure as part of our ongoing efforts to focus more on improving warm-up performance," said Hiroshi Yamada, Manager, Bridgestone Motorsport Department.

"When rider comments about warm-up performance started last year, we developed the extra soft compound rubber for the rear tyres to improve the situation. Then at the start of this year we already selected softer compound options for five of the first nine races, again to provide tyres that warm-up more quickly.

"Then during the Italian Grand Prix we decided to bring softer spec rears to a further six of the remaining nine races, and with this latest change to our tyre approach we very much hope to arrive at a situation where the riders feel satisfied with the extra tyre choices they have each weekend and more comfortable with additional softer tyres in the cooler morning sessions."