Regarding the tyres you have use a size that will match the dia of the stock tyres. For eg if you are going for a VXi the stock size is 165/80-R14 for which the best match will be 195/70-R14. But for the ZXi the stock size is 185/70-R14 for which you will have to go for a 195/65-R14. But as far as I know the 65 profile tyre is not available at least in bangalore it isnt. So your next choice will be 195/70-R14. These will be slightly larger than your stock size but you should find goof FE & handling with these. Also as for the K&N is concernec is you are going in for a stock replacement filter then go for it. But if you plan to install a cold air intake system I suggest you wait till your warranty is over else it will be void the minute you install it.
regards
Vikram |