Hi PWs and experts, I have suzuki 660cc alto (2009), and it had stock Bridgestone tyres, that had reached the end of their life so I decided to change them. I was a novice in vehicles so accepted what my friend and the dealer suggested and upon their recommendation switched to 165/70R12 from 135/80R12. I was unsure about the tyre comparison so I searched the net for some online tyre size comparison/calculation tool. I found this online tool helpful so I am posting it. Tire Size Calculator - Compare Tire Sizes
