The governing body has written to teams saying it had “become aware” some rear wings passed tests but had “excessive deflections while cars are in motion”. The FIA has told teams it will introduce new load-deflection tests from 15 June. Teams are being given a month to comply with the new tests so they have enough time to strengthen their wings if necessary. There will be a tolerance of 20% built into the test in the first month of its operation. “The FIA are completely happy it has passed all the tests that are pretty stringent. The first race at which the new tests will come into force is the French Grand Prix on 25-27 June.

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