fistral fig wrote:Can i just add Nigel that generalising you also need to be cautious as I replaced my 12" wheels on my Portugese with 13" wheels without modification to the rear swinging arms, its all in the dia of the the wheel and tyre commbined,.FF
BTW when you use increased sized wheels you should be aware that your speedometer will understate your speed and you might get caught speeding.
You have to use the overall diameter of the wheel AND tyre (or tire) to determine the difference.