I discovered this when shopping around for the best price for tyres - the tyre retailers’ database comes up with sizes for a 4/4: I have a Plus4 which, clearly, has different tyre sizes than a 4/4 🤷🏼♂️
ArthurSBell N44MOG Rolls Royce Green +4 M22ASB Grey Renault Megane Cabriolet M10SAB White Fiat 500
