arvindh said:
I am about to change my All season tires. I want to know how would the width of the tires affect the performance of my nox. Also will there be any change in mileage if i install wider tires?
I currently have GENERAL Grabber P235/65R16.
I was looking at Bridgestone P235/75R16 or something like that. ;D
75R/16 is not the way to go, - by doing so will increase your overall diameter from 28.02"(711.7mm) to 29.87"(758.9mm).
Which is a 6% increase in diameter - which is over the safe limit of 3%, some tire shops won't change this over for you as going over a 3% increase in factory diameter may cause brake failure.
The other perspective is, if your actual speed is 60mph, your speedo will only show 56mph (it's 6.6% out)
Stick to the 65R16, if you want wider, get your tire shop to fit you one.
The cross section and the sidewall height are directly related to each other. If you change one value it changes the other.
For example, you want wider so you pick a 245/65R16 - even though the cross section increases the diameter differs also by 0.5"(12.96mm)
Your tire shop will find you a wider tire that will be really close to the original diameter so that everything works perfectly.[/color]