Originally Posted by
crn3371
Is there a rule of thumb as to “x”mm increase in wheel width = “y”mm increase in tire width? And will tire height change with a change in wheel width? Thanks.
If you increase the rim width by 2 mm you must also add 2 mm to the width of the tyre casing in order for the sidewall to move out 1 mm on each side. So if you fit your current tyres to wider rims the effective tyre width will increase by only half the increase in rim width.