standard size is 185/65/15 right?
if u wanna put 195, it should be 195/65/15 or max 195/70/15 so that overall dia stays the same
next if u wanna put 205, it should be 205/60/15 or max 205/65/15 which i doubt will fit
still further if u wanna go for 215 or 225, ull have to lower the profile to 50 or maybe 45 to allow the tyre to fit.u cant have 215/65/r15 in the same space, there will be a huge diff in 195/65/15 and 215/65/15 tyre height and sidewall. 215 will have more sidewall height than 195