I currently have 225/70/15 tyres on my Cherokee XJ at the moment, but they all need changing, so I was thinking of going up to 225/75/15 to gain the extra 11mm for a few reasons:
It should reduce the gearing and engine RPM at cruising speeds, potentially meaning a saving in fuel.
They fill the arches more, which looks better.
The cost difference is hardly noticeable.
I realise the speedo may read slighly under the actual speed, however as I know a tolerance is built in for the speedos to over-read, it should be fine.
Apart from that, is there any reason I should stay with the 225/70s?