175/65 R14 will be a wrong upsize for your vehicle. The rolling radius of the wheel will increase by nearly 6.56 per cent in comparison to the stock tyre. A correct upsize would be the one where the difference between the two is under or equal to 3 per cent mark. You can opt for 165/60 R14. That would be a correct upsize.
I am currently running company fitted 185/70 R14 size tyres on my Swift. I wish to install 15-inch alloys on it, what will be the most suitable tyre size to provide better cornering stability?