You guys should read this first:
Michelin will urge the seven F1 teams who use their tyres not to race in Sunday's United States Grand Prix, unless they are cleared to use new rubber flown-in especially for the race in Indianapolis.
Their concerns stem from the accident suffered by Ralf Schumacher during Friday practice, the German losing control of his Toyota in the 190 mph final corner at the Indianapolis Motor Speedway and slamming into the outer wall.
Although Schumacher escaped injury, he has been prevented from racing as a precautionary measure. But, with Michelin threatening to withdraw the tyres they have taken to the United States amid concerns about their safety and integrity, as many as 14 drivers could conceivably be absent from the 73-lap race.
The tyre company are flying in a new batch of tyres they believe are better suited to withstand the unique demands placed by the circuits's banked corner - the corner where Schumacher's accident occurred.
But Michelin will need permission from the FIA governing body to change tyres during a race weekend and, if permission is not forthcoming, then they will suggest teams withdraw from the race on safety grounds.
Michelin's F1 boss Nick Shorrock said: "As it stands we would advise the teams that they shouldn't race unless there is new information coming through from the tests that are under way.
"If we have no further information on the product that we've got and why we had the failure yesterday, we will propose to the teams not to go out and race."
Schumacher's accident occurred after a failure in his car's left-rear tyre. As a stop-gap measure, Michelin have been instructing teams to increase tyre pressure in their rear tyres - but such a practice results in a loss of grip at the rear of the car.
Changing tyres would break four separate FIA regulations, and the governing body may see Michelin's difficulties as being fundamentally of their own making - with rival supplier Bridgestone experiencing no such problems.
Michelin's actions received backing from Renault F1 boss Flavio Briatore: "We fully support Michelin in this situation, and in the efforts they are making to resolve it."
However BAR-Honda boss Nick Fry, while stressing that the team are listening to Michelin's concerns, said that their cars were running without problem on the current supply.
"At the moment we are going quite nicely on the tyres we have," he said. We have no evidence that we have a problem but we are obviously taking advice from Michelin."
"We did a lot of laps yesterday on these tyres and we are quite happy with these tyres."
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