Sorry everyone, actual tyre size confirmed by Honda as 185 55 R16 NOT 60 profile as I thought.
Jazz GR 2020 SE and SR 185/60R15 88H
Jazz GR 2020 EX 185/55R16 87H
Jazz GR 2020 Crosstar 185/60R16 86H
These are tyre size for italian GR Jazz, no other size allowed.
We can only downgrade the speed code using winter tires, but only from 15th november to 15th april.