aka_juffa wrote:wider tyres while retaining the height ratio. An example is a 205/50/15 tyre/wheel combo will give a total wheel/tyre height of 587mm, and a 225/50/15 combo gives a total height of 607mm, an extra 20mm.
Just remember that because the wheel is attached in teh centre, whatever total wheel+tyre diameter difference will be divided by 2 to get excess ground clearance.
so a 20mm larger diamter combo will give 10mm higher ground clearance (Since the other 10mm will be on the top of the wheel)