ReggieGasket
Member
The standard tyres on my C320 CDI Sport are 225/17 front and 255/17 rear. I've changed to 18" wheels and informed my insurance company. But what is theri attitude to changing tyre sizes? Do I have to stick to 225 and 255? I'm mainly concerned with what would happen if I went narrower on the back (from an insurance point of view).