@liana rules, dekho mje to such mei aj tak tyre size calculation samaj nae ai but its a fact bigger tyre gives you false readings and extra aceleration load on the engine.
im also using 185/65-14. dat doesnt means its the best size, even in my car the tyre has never touched the body, except for once wen the fender sheild was broken.
and vitz 2004 and 2005 tyre sizes so check wid the tyre size calculator 155/80-13 is off 99-04 and 165-70-14 i guess for 05+ vitz dats also a perfect match.