Division 6.8.3 F1
The outer diameter of the tyre, measured six hours after the load/speed endurance test, must not differ by more than ± 3,5 % from the outer diameter as measured before the test.
The outer diameter of the tyre, measured six hours after the load/speed endurance test, must not differ by more than ± 3,5 % from the outer diameter as measured before the test.